Lanes: Lane Compare + SnapsDistance GQL API

[luvkapur]

Proposed Changes

• Add Compare tab to the Lane Page
  • Allows comparing a lane with another lane
  • default to main for non main lanes, and the first non main lane for main
  • hidden if the scope has only (1) lane
• Fix diffStatus API on lanes.main.runtime.
  • Allow diffing when source lane is main
  • When comparing two lanes, diff the sourceHead with the last commonSnap instead of head on target
• Add snapDistance to LaneComponentDiffStatus result
  • query common snaps, sourceOnly or targetOnly snaps between components in source and target lane

Screen.Recording.2023-02-07.at.11.10.50.AM.mov