Enable Pseudowire/VPLS Xconnect Endpoints as Neighbors on L2 Topology Maps

NetBrain currently surfaces xconnect table data only within the device info panel and does not expose Pseudowire/VPLS xconnect endpoints as neighbors within the L2 Overlay, so users cannot extend a topology map to include these connections through the standard expand (+) workflow. This enhancement would add xconnect-derived endpoints to the L2 Overlay neighbor list and allow them to be added and drawn on the map using the same neighbor-expansion interaction available for other L2 neighbor types. Customers running Pseudowire/VPLS environments would gain complete topology visibility for these logical connections, reducing manual map construction and improving accuracy for troubleshooting and documentation.