[Glitch] Add stricter ESLint rules for Typescript files

Port 5eeb40bdbe to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/actions/app.ts

@@ -1,8 +1,9 @@
 import { createAction } from '@reduxjs/toolkit';
+
 import type { LayoutType } from '../is_mobile';
 
-type ChangeLayoutPayload = {
+interface ChangeLayoutPayload {
   layout: LayoutType;
-};
+}
 export const changeLayout =
   createAction<ChangeLayoutPayload>('APP_LAYOUT_CHANGE');