Slate v2 Ref Docs Truth Pass

Goal

Stop the ref API docs from overclaiming legacy static transform helpers that the current runtime-id/range-backed ref model does not actually expose.

Completed

• removed the fake static-method sections from:
  • path-ref.md
  • point-ref.md
  • range-ref.md
• made the current contract explicit:
  • refs are created through Editor.pathRef(...)
  • refs are created through Editor.pointRef(...)
  • refs are created through Editor.rangeRef(...)
  • the editor owns ref updates
  • unref() is the public lifecycle seam

Verification

• targeted grep over the docs stack to confirm no stale static ref helper claim remains