feat(FN-968): initialize @fusion/tui workspace package

- Add @fusion/tui as a new private workspace package with ink and React dependencies
- Configure TypeScript with JSX (react-jsx), strict mode, and Node16 module resolution
- Add minimal src/index.tsx entry point with package exports
- Update root README.md with tui package reference
- Add pnpm-lock.yaml entries for ink, ink-text-input, and @types/react

README.md

@@ -466,6 +466,7 @@ The engine automatically recovers from transient failures using bounded exponent
 | `@fusion/core` | Domain model — tasks, board columns, SQLite store |
 | `@fusion/dashboard` | Web UI — Express server + kanban board with SSE |
 | `@fusion/engine` | AI engine — triage, execution, scheduling, workflow steps |
+| `@fusion/tui` | Terminal UI — Ink-based CLI components |
 | `@gsxdsm/fusion` | CLI + pi extension — published to npm |
 
 ## Configuration Reference