[Project] Neighbor expansion UX

Placeholder project for rethinking the experience of neighbor expansion through Graph Explorer.

## Current Implementation

- Sidebar UI is confusing
- Filter options are hidden by default making them difficult to discover
- Limit behavior can be inconsistent depending on the state of the graph
- Default expansion is not configurable
- Can not expand specific edge types

## Tasks
- [ ] [Spike] Gather goals for neighbor expansion
- [ ] [Spike] Rough UI designs to achieve goals
- [ ] [Spike] Plan implementation
- [ ] [Task] Add default expansion limit configuration option
- [ ] [Task] List edge types and counts in expansion sidebar
- [ ] [Task] List edge types and counts in node details
- [ ] [Task] Allow expansion of specific edge types