Add Xquik API

[kriptoburak]

Summary

• Add Xquik to the API catalog as an authenticated Social Media API.
• Include the public docs URL, API base URL, example endpoint, tags, response format, auth, and pricing metadata.

Validation

• python3 -m json.tool catalog/apis.json
• Catalog schema and duplicate-id validation script
• git diff --check
• URL checks for https://xquik.com and https://docs.xquik.com/api-reference/overview