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/resources/scene-summary.ts

@@ -11,7 +11,7 @@ function polygonArea(poly: Poly2D): number {
   for (let i = 0; i < poly.length; i++) {
     const a = poly[i]
     const b = poly[(i + 1) % poly.length]
-    if (!a || !b) continue
+    if (!(a && b)) continue
     sum += a[0] * b[1] - b[0] * a[1]
   }
   return Math.abs(sum) / 2
@@ -32,7 +32,7 @@ function emptyBBox(): BBox {
 }
 
 function expandBBox(bbox: BBox, x: number, y: number, z: number): void {
-  if (!Number.isFinite(x) || !Number.isFinite(y) || !Number.isFinite(z)) return
+  if (!(Number.isFinite(x) && Number.isFinite(y) && Number.isFinite(z))) return
   bbox.empty = false
   if (x < bbox.min[0]) bbox.min[0] = x
   if (y < bbox.min[1]) bbox.min[1] = y