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/core/package.json

@@ -4,12 +4,12 @@
   "type": "module",
   "exports": {
     ".": {
-      "import": "./dist/index.js",
-      "types": "./dist/index.d.ts"
+      "types": "./src/index.ts",
+      "import": "./dist/index.js"
     },
     "./gh-cli": {
-      "import": "./dist/gh-cli.js",
-      "types": "./dist/gh-cli.d.ts"
+      "types": "./src/gh-cli.ts",
+      "import": "./dist/gh-cli.js"
     }
   },
   "publishConfig": {

packages/core/tsconfig.json

@@ -2,7 +2,8 @@
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
     "outDir": "dist",
-    "rootDir": "src"
+    "rootDir": "src",
+    "types": ["node", "vitest/globals"]
   },
-  "include": ["src"]
+  "include": ["src/**/*"]
 }