Extract keybindings contracts into dedicated module

- add `packages/contracts/src/keybindings.ts` with keybinding schemas and types
- import keybindings config schema from `server.ts`
- re-export keybindings contracts from `packages/contracts/src/index.ts`
9cebeeeda1Julius Marminge committed on 2/15/2026, 7:24:14 PMparent68f3184
3 files changedLine totals unavailable