Refactor PolicyEngine to Core Package (#12325)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/core/package.json

@@ -24,6 +24,7 @@
     "@google-cloud/opentelemetry-cloud-monitoring-exporter": "^0.21.0",
     "@google-cloud/opentelemetry-cloud-trace-exporter": "^3.0.0",
     "@google/genai": "1.16.0",
+    "@iarna/toml": "^2.2.5",
     "@joshua.litt/get-ripgrep": "^0.0.3",
     "@modelcontextprotocol/sdk": "^1.11.0",
     "@opentelemetry/api": "^1.9.0",
@@ -65,7 +66,8 @@
     "tree-sitter-bash": "^0.25.0",
     "undici": "^7.10.0",
     "web-tree-sitter": "^0.25.10",
-    "ws": "^8.18.0"
+    "ws": "^8.18.0",
+    "zod": "^3.25.76"
   },
   "optionalDependencies": {
     "@lydell/node-pty": "1.1.0",