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

tsconfig.base.json

@@ -13,6 +13,7 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "outDir": "dist",
-    "rootDir": "src"
+    "rootDir": "src",
+    "types": ["node"]
   }
 }