Add frontend autoformatting and set CI to require formatted code for all languages (#6052)

# Description of Changes
Changes the strategy for autoformatting to reject PRs if they are not
formatted correctly instead of allowing them to merge and then spawning
a new PR to fix the formatting. The old strategy just caused more work
for us because we'd have to manually approve the followup PR and get it
merged, which required 2 reviewers so in practice it rarely got done and
just meant everyone's PRs ended up containing reformatting for unrelated
files, which makes code review unnecessarily difficult. If the PR's code
is not formatted correctly after this PR, a comment will be added
automatically to tell the author how to run the formatter script to fix
their code so it can go in.

This also enables autoformatting for the frontend code, using Prettier.
I've enabled it for pretty much everything in the frontend folder, other
than 3rd party files and files it doesn't make sense for. I also
excluded Markdown because it sounds likely to be more annoying to have
to autoformat the Markdown in the frontend folder but nowhere else. Open
to changing this though if people disagree.

> [!note]
> 
> Advice to reviewers: The first commit contains all of the actual logic
I've introduced (CI changes, Prettier config, etc.)
> The second commit is just the reformatting of the entire frontend
folder.
> The first commit needs proper review, the second one just give it a
spot-check that it's doing what you'd expect.

frontend/src/core/components/onboarding/userStepsConfig.ts

@@ -1,5 +1,5 @@
-import type { StepType } from '@reactour/tour';
-import type { TFunction } from 'i18next';
+import type { StepType } from "@reactour/tour";
+import type { TFunction } from "i18next";
 
 export enum TourStep {
   ALL_TOOLS,
@@ -53,8 +53,11 @@ export function createUserStepsConfig({ t, actions }: CreateUserStepsConfigArgs)
   return {
     [TourStep.ALL_TOOLS]: {
       selector: '[data-tour="tool-panel"]',
-      content: t('onboarding.allTools', 'This is the <strong>Tools</strong> panel, where you can browse and select from all available PDF tools.'),
-      position: 'center',
+      content: t(
+        "onboarding.allTools",
+        "This is the <strong>Tools</strong> panel, where you can browse and select from all available PDF tools.",
+      ),
+      position: "center",
       padding: 0,
       action: () => {
         saveWorkbenchState();
@@ -64,28 +67,40 @@ export function createUserStepsConfig({ t, actions }: CreateUserStepsConfigArgs)
     },
     [TourStep.SELECT_CROP_TOOL]: {
       selector: '[data-tour="tool-button-crop"]',
-      content: t('onboarding.selectCropTool', "Let's select the <strong>Crop</strong> tool to demonstrate how to use one of the tools."),
-      position: 'right',
+      content: t(
+        "onboarding.selectCropTool",
+        "Let's select the <strong>Crop</strong> tool to demonstrate how to use one of the tools.",
+      ),
+      position: "right",
       padding: 0,
       actionAfter: () => selectCropTool(),
     },
     [TourStep.TOOL_INTERFACE]: {
       selector: '[data-tour="tool-panel"]',
-      content: t('onboarding.toolInterface', "This is the <strong>Crop</strong> tool interface. As you can see, there's not much there because we haven't added any PDF files to work with yet."),
-      position: 'center',
+      content: t(
+        "onboarding.toolInterface",
+        "This is the <strong>Crop</strong> tool interface. As you can see, there's not much there because we haven't added any PDF files to work with yet.",
+      ),
+      position: "center",
       padding: 0,
     },
     [TourStep.FILES_BUTTON]: {
       selector: '[data-tour="files-button"]',
-      content: t('onboarding.filesButton', "The <strong>Files</strong> button on the Quick Access bar allows you to upload PDFs to use the tools on."),
-      position: 'right',
+      content: t(
+        "onboarding.filesButton",
+        "The <strong>Files</strong> button on the Quick Access bar allows you to upload PDFs to use the tools on.",
+      ),
+      position: "right",
       padding: 10,
       action: () => openFilesModal(),
     },
     [TourStep.FILE_SOURCES]: {
       selector: '[data-tour="file-sources"]',
-      content: t('onboarding.fileSources', "You can upload new files or access recent files from here. For the tour, we'll just use a sample file."),
-      position: 'right',
+      content: t(
+        "onboarding.fileSources",
+        "You can upload new files or access recent files from here. For the tour, we'll just use a sample file.",
+      ),
+      position: "right",
       padding: 0,
       actionAfter: () => {
         loadSampleFile();
@@ -94,62 +109,88 @@ export function createUserStepsConfig({ t, actions }: CreateUserStepsConfigArgs)
     },
     [TourStep.WORKBENCH]: {
       selector: '[data-tour="workbench"]',
-      content: t('onboarding.workbench', 'This is the <strong>Workbench</strong> - the main area where you view and edit your PDFs.'),
-      position: 'center',
+      content: t(
+        "onboarding.workbench",
+        "This is the <strong>Workbench</strong> - the main area where you view and edit your PDFs.",
+      ),
+      position: "center",
       padding: 0,
     },
     [TourStep.ACTIVE_FILES]: {
       selector: '[data-tour="workbench"]',
-      content: t('onboarding.activeFiles', "The <strong>Active Files</strong> view shows all of the PDFs you have loaded into the tool, and allows you to select which ones to process."),
-      position: 'center',
+      content: t(
+        "onboarding.activeFiles",
+        "The <strong>Active Files</strong> view shows all of the PDFs you have loaded into the tool, and allows you to select which ones to process.",
+      ),
+      position: "center",
       padding: 0,
       action: () => switchToActiveFiles(),
     },
     [TourStep.FILE_CHECKBOX]: {
       selector: '[data-tour="file-card-checkbox"]',
-      content: t('onboarding.fileCheckbox', "Clicking one of the files selects it for processing. You can select multiple files for batch operations."),
-      position: 'top',
+      content: t(
+        "onboarding.fileCheckbox",
+        "Clicking one of the files selects it for processing. You can select multiple files for batch operations.",
+      ),
+      position: "top",
       padding: 10,
     },
     [TourStep.CROP_SETTINGS]: {
       selector: '[data-tour="crop-settings"]',
-      content: t('onboarding.cropSettings', "Now that we've selected the file we want crop, we can configure the <strong>Crop</strong> tool to choose the area that we want to crop the PDF to."),
-      position: 'left',
+      content: t(
+        "onboarding.cropSettings",
+        "Now that we've selected the file we want crop, we can configure the <strong>Crop</strong> tool to choose the area that we want to crop the PDF to.",
+      ),
+      position: "left",
       padding: 10,
       action: () => modifyCropSettings(),
     },
     [TourStep.RUN_BUTTON]: {
       selector: '[data-tour="run-button"]',
-      content: t('onboarding.runButton', "Once the tool has been configured, this button allows you to run the tool on all the selected PDFs."),
-      position: 'top',
+      content: t(
+        "onboarding.runButton",
+        "Once the tool has been configured, this button allows you to run the tool on all the selected PDFs.",
+      ),
+      position: "top",
       padding: 10,
       actionAfter: () => executeTool(),
     },
     [TourStep.RESULTS]: {
       selector: '[data-tour="tool-panel"]',
-      content: t('onboarding.results', "After the tool has finished running, the <strong>Review</strong> step will show a preview of the results in this panel, and allow you to undo the operation or download the file. "),
-      position: 'center',
+      content: t(
+        "onboarding.results",
+        "After the tool has finished running, the <strong>Review</strong> step will show a preview of the results in this panel, and allow you to undo the operation or download the file. ",
+      ),
+      position: "center",
       padding: 0,
     },
     [TourStep.FILE_REPLACEMENT]: {
       selector: '[data-tour="file-card-checkbox"]',
-      content: t('onboarding.fileReplacement', "The modified file will replace the original file in the Workbench automatically, allowing you to easily run it through more tools."),
-      position: 'left',
+      content: t(
+        "onboarding.fileReplacement",
+        "The modified file will replace the original file in the Workbench automatically, allowing you to easily run it through more tools.",
+      ),
+      position: "left",
       padding: 10,
     },
     [TourStep.PIN_BUTTON]: {
       selector: '[data-tour="file-card-pin"]',
-      content: t('onboarding.pinButton', "You can use the <strong>Pin</strong> button if you'd rather your files stay active after running tools on them."),
-      position: 'left',
+      content: t(
+        "onboarding.pinButton",
+        "You can use the <strong>Pin</strong> button if you'd rather your files stay active after running tools on them.",
+      ),
+      position: "left",
       padding: 10,
       action: () => pinFile(),
     },
     [TourStep.WRAP_UP]: {
       selector: '[data-tour="help-button"]',
-      content: t('onboarding.wrapUp', "You're all set! You've learnt about the main areas of the app and how to use them. Click the <strong>Help</strong> button whenever you like to see this tour again."),
-      position: 'right',
+      content: t(
+        "onboarding.wrapUp",
+        "You're all set! You've learnt about the main areas of the app and how to use them. Click the <strong>Help</strong> button whenever you like to see this tour again.",
+      ),
+      position: "right",
       padding: 10,
     },
   };
 }
-