Added souce map analyzer and added tree shaking to Babylon to reduce bundle size

package.json

@@ -3,14 +3,14 @@
   "version": "1.5.0",
   "private": true,
   "dependencies": {
+    "@babylonjs/core": "^4.1.0",
+    "@babylonjs/loaders": "^4.1.0",
     "@msgpack/msgpack": "^1.12.1",
     "@stripe/stripe-js": "^1.3.2",
     "@testing-library/jest-dom": "^4.2.4",
     "@testing-library/react": "^9.3.2",
     "@testing-library/user-event": "^7.1.2",
     "ammo.js": "kripken/ammo.js#aab297a4164779c3a9d8dc8d9da26958de3cb778",
-    "babylonjs": "^4.1.0",
-    "babylonjs-loaders": "^4.1.0",
     "case": "^1.6.3",
     "dexie": "^2.0.4",
     "fake-indexeddb": "^3.0.0",
@@ -37,11 +37,13 @@
     "simplebar-react": "^2.1.0",
     "simplify-js": "^1.2.4",
     "socket.io-client": "^2.3.0",
+    "source-map-explorer": "^2.4.2",
     "theme-ui": "^0.3.1",
     "use-image": "^1.0.5",
     "webrtc-adapter": "^7.5.1"
   },
   "scripts": {
+    "analyze": "source-map-explorer 'build/static/js/*.js'",
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",