feat: Update .gitignore and refine TypeScript configuration; clean up commented code and enhance dataset validation; npm updates

- Updated .gitignore to include new patterns
- Refined TypeScript configuration for better performance and readability
- Cleaned up commented code in several files
- Enhanced dataset validation logic
- Updated npm dependencies to the latest versions

app/Controllers/Http/Submitter/DatasetController.ts

@@ -1193,7 +1193,7 @@ export default class DatasetController {
                 throw error;
             } else if (error instanceof Exception) {
                 // General exception handling
-                return response.flash('errors', { error: error.message }).redirect().back();
+                return response.flash('errors', error.message).redirect().back();
             } else {
                 session.flash({ error: 'An error occurred while deleting the dataset.' });
                 return response.redirect().back();