Fix TypeScript module resolution for @objectstack/spec package

- Add @objectstack/spec path mapping to root tsconfig.json
- Override paths in @object-ui/types tsconfig to use node_modules resolution
- This ensures the spec package is resolved via workspace dependency instead of source files

Co-authored-by: huangyiirene <7665279+huangyiirene@users.noreply.github.com>

Author: Copilot

packages/types/tsconfig.json

@@ -7,7 +7,8 @@
     "declarationMap": true,
     "composite": true,
     "noEmit": false,
-    "lib": ["ES2020", "DOM"]
+    "lib": ["ES2020", "DOM"],
+    "paths": {}
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist", "**/*.test.ts", "**/*.spec.ts", "examples"]

tsconfig.json

@@ -21,6 +21,8 @@
 
     "baseUrl": ".",
     "paths": {
+      "@objectstack/spec": ["packages/objectstack-spec/src"],
+      "@objectstack/spec/*": ["packages/objectstack-spec/src/*"],
       "@object-ui/types": ["packages/types/src"],
       "@object-ui/types/*": ["packages/types/src/*"],
       "@object-ui/core": ["packages/core/src"],