Reset core/viewer/editor/mcp packages and apps/editor from private-editor

Wholesale swap of packages/{core,viewer,editor,mcp} and apps/editor with the
versions from the private editor repo, which is the production source of truth.

Setup changes:
- packages/{core,viewer,editor} versions held at 0.7.0 baseline (matching
  the most recent published release) so a bump=minor publishes 0.8.0
- packages/mcp held at 0.1.1 (never published; first publish will go through
  the new release.yml flow)
- peerDependencies and devDependencies for inter-package @pascal-app/*
  references pinned to ^0.7.0 instead of '*' / 'workspace:*' so they are
  valid for npm consumers
- Root package.json: TypeScript bumped to 6.0.2, added overrides for
  @types/react, @types/react-dom, @types/three to prevent JSX namespace
  fragmentation across the workspace
- release.yml extended to also publish editor and mcp; 'both' option renamed
  to 'all'; added a sync step that updates inter-package peerDeps/devDeps to
  match the new versions on every bump (so viewer/editor/mcp tarballs always
  reference the version of core they were built against)
- Root scripts gained release:editor and release:mcp shortcuts

Verification:
- bun install --frozen-lockfile is consistent
- packages/{core,viewer,mcp} build cleanly, dist/index.d.ts emitted
- packages/editor check-types reports 21 pre-existing errors, identical to
  what private-editor currently reports

Open PRs against editor-v2 will need rebasing/conflict resolution.

packages/mcp/src/tools/live-sync.ts

@@ -29,7 +29,7 @@ export async function publishLiveSceneSnapshot(
   syncDerivedStairOpenings(operations)
 
   const active = operations.getActiveScene()
-  if (!active || !operations.canAppendSceneEvents) return
+  if (!(active && operations.canAppendSceneEvents)) return
 
   const graph = operations.exportSceneGraph()
 
@@ -42,6 +42,9 @@ export async function publishLiveSceneSnapshot(
       thumbnailUrl: active.thumbnailUrl,
       graph,
       expectedVersion: active.version,
+      saveMode: 'draft',
+      publish: false,
+      operation: kind,
     })
     operations.setActiveScene(meta)
     await operations.appendSceneEvent({