docs: add Troubleshooting wiki page — 8 sections covering common errors Covers gateway startup, Ollama connection, GPU/VRAM, model tool-calling, provider routing & fallback, agent stall detection, HTTP error codes, and a quick troubleshooting checklist with diagnostic commands. Co-Authored-By: Paperclip <noreply@paperclip.ing>

Djtony707 committed Apr 5, 2026