feat: add comprehensive testing for grouped queue and queue manager functionality

- Introduced tests for the GroupedQueue class, covering basic functionality, concurrency handling, and job processing across multiple groups.
- Added tests for the QueueManager class, ensuring correct queue creation, job management, and handler functionality.
- Implemented tests for concurrency changes and their effects on pending tasks, enhancing overall test coverage for the queue system.
- Created a new ChangeConcurrencyModal component for adjusting deployment concurrency settings in the UI.

packages/server/src/utils/builders/railpack.ts

@@ -97,7 +97,7 @@ docker ${buildArgs.join(" ")} || {
 	exit 1;
 }
 echo "✅ Railpack build completed." ;
-docker buildx rm builder-containerd
+docker buildx rm builder-containerd || true
 `;
 
 	return bashCommand;