Add design thinking components for project management

- Add PhaseNavigator with 5 design phases (Empathize, Define, Ideate, Prototype, Test)
- Add HealthWidget with circular progress and metrics
- Add BacklogBoard with WSJF prioritization display
- Add RecommendationsWidget for AI-powered insights
- Add Tooltip component (shadcn/ui)
- Add design-thinking types with phase configs and backlog item structure

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/project/index.ts

@@ -0,0 +1,4 @@
+export { PhaseNavigator } from './phase-navigator'
+export { HealthWidget } from './health-widget'
+export { BacklogBoard } from './backlog-board'
+export { RecommendationsWidget } from './recommendations-widget'