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/core/components/shared/TextInput.tsx

@@ -71,12 +71,16 @@ export const TextInput = forwardRef<HTMLInputElement, TextInputProps>(
       }
     };
 
-    const shouldShowClearButton = showClearButton && value.trim().length > 0 && !disabled && !readOnly;
+    const shouldShowClearButton =
+      showClearButton && value.trim().length > 0 && !disabled && !readOnly;
 
     return (
       <div className={`${styles.container} ${className}`} style={style}>
         {icon && (
-          <span className={styles.icon} style={{ color: colorScheme === "dark" ? "#FFFFFF" : "#6B7382" }}>
+          <span
+            className={styles.icon}
+            style={{ color: colorScheme === "dark" ? "#FFFFFF" : "#6B7382" }}
+          >
             {icon}
           </span>
         )}