Add shared-scene 2D authoring, sprite animation and Rapier2D physics

package.json

@@ -2,7 +2,7 @@
   "name": "forma-engine",
   "version": "0.3.0",
   "private": true,
-  "description": "Browser-based 3D editor, runtime and local MCP server.",
+  "description": "Browser-based 2D/3D editor, runtime and local MCP server.",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/emil28092005/forma-engine.git"
@@ -29,11 +29,13 @@
     "editor:export": "node --import tsx scripts/export-editor.ts",
     "build:doctor": "node native/build.mjs --doctor",
     "setup:desktop": "npm ci --prefix native",
-    "setup:android": "node native/setup-android.mjs"
+    "setup:android": "node native/setup-android.mjs",
+    "docs:reference": "node --import tsx scripts/update-reference.ts"
   },
   "dependencies": {
     "@babylonjs/core": "9.25.0",
     "@babylonjs/loaders": "9.25.0",
+    "@dimforge/rapier2d-compat": "0.20.0",
     "@dimforge/rapier3d-compat": "0.20.0",
     "@modelcontextprotocol/sdk": "1.30.0",
     "fflate": "0.8.3",