Prettier 2: Electric Boogaloo (#6113)

# Description of Changes
When I added Prettier formatting in #6052, my aim was to use just the
default settings in Prettier. Turns out, Prettier looks _really hard_
for any config files if it's not explicitly given one, which means that
if a developer has some sort of Prettier config file lying around on
their system, Prettier might find it and use it. Also, Prettier changes
its defaults based on stuff in `.editorconfig` without any good way of
disabling that behaviour explicitly in its config file.

To solve both of these issues, I've introduced a `.prettierrc` file
which sets Prettier's defaults explicitly, and then reformatted all our
code _again_ in Prettier's actual default settings. This should achieve
the aim of #6052 and remove the possibility for it breaking on different
dev computers.

frontend/src/desktop/components/shared/DisabledButtonWithTooltip.tsx

@@ -14,11 +14,23 @@ interface DisabledButtonWithTooltipProps {
  * Mantine's disabled prop prevents pointer events entirely, so this is a plain
  * div styled to match a disabled button with a custom hover tooltip.
  */
-export function DisabledButtonWithTooltip({ tooltip, children, className, style }: DisabledButtonWithTooltipProps) {
+export function DisabledButtonWithTooltip({
+  tooltip,
+  children,
+  className,
+  style,
+}: DisabledButtonWithTooltipProps) {
   const [hovered, setHovered] = React.useState(false);
   return (
-    <div className="relative w-full" onMouseEnter={() => setHovered(true)} onMouseLeave={() => setHovered(false)}>
-      <div className={`locked-button${className ? ` ${className}` : ""}`} style={style}>
+    <div
+      className="relative w-full"
+      onMouseEnter={() => setHovered(true)}
+      onMouseLeave={() => setHovered(false)}
+    >
+      <div
+        className={`locked-button${className ? ` ${className}` : ""}`}
+        style={style}
+      >
         {children}
       </div>
       {hovered && (