feat(KB-141): fix workspace type resolution and add clean-checkout typecheck tests

- Remove dist-dependent workspace type resolution from all tsconfig files

- Add clean-checkout typecheck regression test to CI suite

- Update package.json type definitions for core, engine, dashboard, and cli packages

- Update README with typecheck testing documentation

- Clean up unused test files and component dependencies

packages/dashboard/tsconfig.app.json

@@ -8,5 +8,6 @@
     "noEmit": true,
     "types": ["vitest/globals", "@testing-library/jest-dom", "node"]
   },
-  "include": ["app"]
+  "include": ["app/**/*"],
+  "exclude": ["app/**/*.test.ts", "app/**/*.test.tsx"]
 }