Enable the Enable max-len and max-lines eslint rules (#1842)

## Description:

Enable the Enable `max-len` and `max-lines` eslint rules.

Fixes #1785

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

src/client/FlagInput.ts

@@ -56,12 +56,15 @@ export class FlagInput extends LitElement {
       <div class="flex relative">
         <button
           id="flag-input_"
-          class="border p-[4px] rounded-lg flex cursor-pointer border-black/30 dark:border-gray-300/60 bg-white/70 dark:bg-[rgba(55,65,81,0.7)]"
+          class="border p-[4px] rounded-lg flex cursor-pointer border-black/30
+          dark:border-gray-300/60 bg-white/70 dark:bg-[rgba(55,65,81,0.7)]"
           title="Pick a flag!"
         >
           <span
             id="flag-preview"
-            style="display:inline-block;width:48px;height:64px;vertical-align:middle;background:#333;border-radius:6px;overflow:hidden;"
+            style="display:inline-block; width:48px; height:64px;
+            vertical-align:middle; background:#333; border-radius:6px;
+            overflow:hidden;"
           ></span>
         </button>
       </div>