chore: install openapi-typescript (#89)

Author: feloy

package.json

@@ -113,6 +113,7 @@
     "eslint-plugin-sonarjs": "^3.0.2",
     "eslint-plugin-unicorn": "^58.0.0",
     "globals": "^16.0.0",
+    "openapi-typescript": "^7.7.1",
     "prettier": "^3.5.3",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.30.1",