feat(ccw): migrate backend to TypeScript

- Convert 40 JS files to TypeScript (CLI, tools, core, MCP server)
- Add Zod for runtime parameter validation
- Add type definitions in src/types/
- Keep src/templates/ as JavaScript (dashboard frontend)
- Update bin entries to use dist/
- Add tsconfig.json with strict mode
- Add backward-compatible exports for tests
- All 39 tests passing

Breaking changes: None (backward compatible)

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

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

ccw/src/index.ts

@@ -0,0 +1,9 @@
+/**
+ * CCW - Claude Code Workflow CLI
+ * Main exports for programmatic usage
+ */
+
+export { run } from './cli.js';
+export { scanSessions } from './core/session-scanner.js';
+export { aggregateData } from './core/data-aggregator.js';
+export { generateDashboard } from './core/dashboard-generator.js';