chore: add knip

Author: Frank Fiegel

package.json

@@ -31,7 +31,7 @@
   },
   "scripts": {
     "build": "tsc",
-    "lint": "eslint .",
+    "lint": "eslint . && knip",
     "test": "vitest run",
     "test:watch": "vitest",
     "start:server": "node dist/server/index.js"
@@ -64,8 +64,8 @@
     "eslint": "^9.39.2",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-perfectionist": "^5.3.1",
-    "globals": "^17.0.0",
     "jiti": "^2.6.1",
+    "knip": "^5.82.0",
     "semantic-release": "^25.0.2",
     "supertest": "^7.2.2",
     "typescript": "^5.9.3",