feat: initial enforcement of template policy

backend/package.json

@@ -78,6 +78,7 @@
     "@types/picomatch": "^2.3.3",
     "@types/prompt-sync": "^4.2.3",
     "@types/resolve": "^1.20.6",
+    "@types/safe-regex": "^1.1.6",
     "@types/uuid": "^9.0.7",
     "@typescript-eslint/eslint-plugin": "^6.20.0",
     "@typescript-eslint/parser": "^6.20.0",
@@ -171,6 +172,7 @@
     "pino": "^8.16.2",
     "posthog-node": "^3.6.2",
     "probot": "^13.0.0",
+    "safe-regex": "^2.1.1",
     "smee-client": "^2.0.0",
     "tedious": "^18.2.1",
     "tweetnacl": "^1.0.3",