♻️(frontend) starting a bit more structured frontend app

the idea is to use react aria, panda-css, react query and wouter as a
base, in addition to livekit react components

this is still mostly wip but it's usable:

- homepage shows a login link to create a room
- before joining a room you are asked to configure your audio/video/user
name
- note that if you directly go to a a conference url it creates it even
if you are not logged in… very secured!

src/frontend/.eslintrc.cjs

@@ -5,6 +5,8 @@ module.exports = {
     'eslint:recommended',
     'plugin:@typescript-eslint/recommended',
     'plugin:react-hooks/recommended',
+    'plugin:@tanstack/eslint-plugin-query/recommended',
+    'plugin:jsx-a11y/recommended',
   ],
   ignorePatterns: ['dist', '.eslintrc.cjs'],
   parser: '@typescript-eslint/parser',