feat: add bundle analysis support

Add `webpack-bundle-analyzer` and a new `analyze` script to allow
visualizing bundle composition via `npm run analyze`.

package.json

@@ -18,6 +18,7 @@
     "dev": "rsbuild dev",
     "build": "rsbuild build",
     "preview": "rsbuild preview",
+    "analyze": "cross-env ANALYZE=true rsbuild build",
     "cli:dev": "tsc -p tsconfig.cli.json --watch",
     "cli:build": "tsc -p tsconfig.cli.json",
     "ttrpg": "node --loader ts-node/esm ./src/cli/index.ts",
@@ -67,12 +68,14 @@
     "@types/node": "^22.19.13",
     "@types/uuid": "^10.0.0",
     "@types/ws": "^8.18.1",
+    "cross-env": "^10.1.0",
     "husky": "^9.1.7",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
     "tailwindcss": "^4.0.0",
     "ts-jest": "^29.4.6",
     "ts-node": "^10.9.2",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "webpack-bundle-analyzer": "^5.3.0"
   }
 }