Add extension options, fix settings save and CSP, update docs
- Options: default max peers, ready timeout (ms), disable on file://,
notify on host disconnect, plus existing app name, request timeout, debug
- Use storage.local instead of storage.sync so settings persist (e.g. in
Firefox options page); add save/reset error handling in options UI
- Move options page script to options.js for CSP compliance (no inline script)
- manifest: add "notifications" permission for disconnect notification
- Docs: README (settings section, file layout), API-REFERENCE (ready timeout,
constructor defaults, request timeout), ARCHITECTURE (storage, options page,
content script behavior), DATA-API and examples/README (default timeout,
file:// option)
Raven Scott
bef6e3fdbd