refactor: Update .gitignore and enhance error handling in feature-loader

Changes:
- Removed specific compiled file patterns from .gitignore to simplify ignore rules.
- Modified error handling in feature-loader.ts to rethrow errors instead of keeping original paths, preventing potential broken references.
- Added ".js" extensions to import statements in types package for ESM compliance.

Benefits:
✅ Cleaner .gitignore for better maintainability
✅ Improved error handling logic in feature-loader
✅ Consistent import paths for ESM compatibility

All tests passing.

libs/types/package.json

@@ -1,6 +1,7 @@
 {
   "name": "@automaker/types",
   "version": "1.0.0",
+  "type": "module",
   "description": "Shared type definitions for AutoMaker",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",