feat(audit, frontend, backend): introduce audit scripts and enhance error handling

- Added new npm scripts for auditing frontend size and inline TODOs, improving code quality management.
- Enhanced error handling in the `nuscoreApiRoutes` to return specific validation error statuses, improving API response clarity.
- Updated SQL migration documentation to establish a clear process for manual migrations and ensure backward compatibility.
- Refactored various components to align with new design standards, enhancing UI consistency across the application.

package.json

@@ -6,6 +6,8 @@
     "dev": "concurrently \"cd backend && npm run dev\" \"cd frontend && npm run dev\"",
     "dev:backend": "cd backend && npm run dev",
     "dev:frontend": "cd frontend && npm run dev",
+    "audit:frontend-size": "bash ./scripts/audit_frontend_size.sh",
+    "audit:inline-todos": "bash ./scripts/audit_inline_todos.sh",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],