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.

apps/server/src/services/feature-loader.ts

@@ -143,8 +143,9 @@ export class FeatureLoader {
         }
       } catch (error) {
         logger.error(`Failed to migrate image:`, error);
-        // Keep original path if migration fails
-        updatedPaths.push(imagePath);
+        // Rethrow error to let caller decide how to handle it
+        // Keeping original path could lead to broken references
+        throw error;
       }
     }