Add .t3 keybindings and initial local runtime state files

- add default `.t3/keybindings.json` for terminal/chat/editor/diff shortcuts
- include initial provider log files and SQLite state artifacts under `apps/server/.t3`
454ddeea57Julius Marminge committed on 2/27/2026, 4:48:18 AMparent6f2181d
6 files changedLine totals unavailable