chore(deps): enforce pnpm

Author: json-derulo

.npmrc

@@ -0,0 +1 @@
+engine-strict = true

package.json

@@ -57,5 +57,10 @@
     "typescript": "~5.8.0",
     "typescript-eslint": "^8.0.0"
   },
+  "engines": {
+    "npm": "Please use pnpm instead of npm to install dependencies",
+    "yarn": "Please use pnpm instead of yarn to install dependencies",
+    "pnpm": "^10.7.0"
+  },
   "packageManager": "pnpm@10.7.0"
 }