SvelteKit Yjs form POC

Context: https://github.com/stephane-klein/backlog/issues/274

Getting started

$ asdf install
$ pnpm install

Start WebRTC server:

$ ./node_modules/.bin/y-webrtc-signaling
Signaling server running on localhost: 4444

Start webapp:

$ pnpm run dev

Open http://localhost:5173/form1 in two browser windom and play with form fields.