Show neighbors for selected node in table view

When a node is selected, show a list of all connected neighbors in the table view.

* Columns include
* Connection direction (incoming or outgoing)
* Connection display name (edge label)
* Node ID
* Node display name
* Node display description
* Can sort and filter on columns
* Individual neighbors can be added or removed
* Add all button to add all neighbors matching filter

The existing table view would remain. The UI would be updated to change the table selector from a drop down to a tab switch.