Slate v2 Roadmap React Spec Core Name Fix

Supporting plan. For current queue and roadmap truth, see master-roadmap.md.

Goal

• Remove the last active-spec use of slate-v2 where the doc clearly meant the slate package.

Finding

• react-runtime-spec.md still said:
  • Core Contract Required From \slate-v2``
  • `slate-v2` owns committed state
• That contradicted the frozen package naming used everywhere else in the live roadmap/spec stack.

Patch

• Normalize those references to slate.

Verification

• pnpm exec prettier --check /Users/zbeyens/git/plate-2/docs/slate-v2/react-runtime-spec.md /Users/zbeyens/git/plate-2/docs/plans/2026-04-07-slate-v2-roadmap-react-spec-core-name-fix.md
• grep confirms the stale active-spec slate-v2 core references are gone