feat(rtty): Add remote package installation for mesh nodes
Add rttyctl commands for remote package deployment:
- rttyctl install <node|all> <app_id> - Install package on node(s)
- rttyctl install-status <node> [app] - Check package status
- rttyctl deploy-ttyd <node|all> - Deploy ttyd web terminal
RPCD methods added:
- install_remote, install_mesh, deploy_ttyd, install_status
Features:
- Node discovery from master-link, WireGuard, P2P mesh
- Auto-enables and starts ttyd after installation
- Batch install with summary stats (installed/skipped/failed)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>