Adds the Orca Mobile companion app (Expo SDK 55 / React Native 0.83) with:
- QR code pairing flow: scan orca://pair# URL, validate auth, save host profile
- WebSocket RPC client with auto-reconnect, exponential backoff, streaming support
- Three screens: host list, worktree list, terminal session with live output
- Mock WebSocket server for development without a running Orca desktop instance
- Desktop-side: TLS certificate management, device registry, mobile IPC handlers,
WebSocket transport layer, and pairing offer encode/decode with Zod validation
- Unit tests for WebSocket transport and pairing codec
Co-authored-by: Orca <help@stably.ai>
Jinwoo-HandOrca