`Feature`: integrate node groups

## General add node groups, similar to Proxmox HA groups, to control where VMs are allowed to migrate ## Details to allow clustering different nodes together, ProxLB should be able to make node groups to which VMs are being assigned rebalancing could work similar to native Proxmox HA restricted = yes VM may only migrate within its assigned node group. If no node in the group is available, no migration occurs. restricted = no VM should prefer migration within its current group. Migration outside the group is allowed only if no nodes in the current group are available. One idea would be to utilise the already existing Proxmox Node assignments in /etc/pve/ha/groups.cfg or preferably, this could be implemented inside proxlb.yaml for example: ``` groups: AMD-HA: nodes: - pve-amd-node13-th-I - pve-amd-node14-th-I INTEL-HA: nodes: - pve-intel-node12-th-I - pve-intel-node13-th-I ``` VMs can then be pinned to the according group please let me know what you think Best regards hugo