Title: Add x.ai (Grok) as AI provider for Zammad 7.0
It would be great if you support x.ai from the start of Zammad 7.0.
Edit: Just saw this Github issue. This would resolve the problem, because the x.ai API is OpenAI compatible: AI Provider - Add support for OpenAI-compatible servers · Issue #5864 · zammad/zammad · GitHub
