Add Wiki VectorDB Chat skill

Multi-provider AI chat with RAG pipeline for Z.ai portal.
Includes SKILL.md, deploy and health-check scripts.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

skills/wiki-vector-chat/README.md

@@ -0,0 +1,22 @@
+# Wiki VectorDB Chat Skill
+
+Deploy and manage the Zportal Wiki AI chat system.
+
+## Quick Start
+
+```bash
+./scripts/deploy.sh
+./scripts/health-check.sh
+```
+
+## Triggers
+
+- "setup wiki chat"
+- "deploy vector chat"
+- "add AI provider to wiki"
+- "fix wiki chat"
+- "configure RAG pipeline"
+
+## Repository
+
+https://github.rommark.dev/admin/Zportal-Wiki-VectorDB-Chat