♻️(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/@types/react-query.d.ts

@@ -0,0 +1,7 @@
+import { ApiError } from '../src/api/ApiError'
+
+declare module '@tanstack/react-query' {
+  interface Register {
+    defaultError: ApiError
+  }
+}