[Feature] Support VM management on child nodes

Environment Information

1Panel Version

v2.3.0

Detailed information

Please describe your needs or suggestions for improvements

Currently, the VM management feature is only available on the master node; child nodes cannot use it.

My scenario: the master node has weak hardware and mainly serves as the central management entry point, while the child nodes have much stronger hardware and are the machines that should actually run VMs. However, VM management cannot be enabled on child nodes, so the Pro VM management capability cannot be used where the resources actually are.

Please describe the solution you suggest

With a Pro license, please allow enabling VM management on child nodes as well — e.g. a toggle per node in node management — so VMs on all child nodes can be managed and displayed centrally from the master node.

Additional Information

Both the master node and the child nodes have Pro licenses.

No files or tests are named. Start by tracing the existing VM management path on the master node and how nodes are managed, then determine how per-node enablement and centralized VM display are wired. Done means Pro-licensed child nodes can run and be managed for VMs from the master node without breaking current master-node behavior.