docs: update references and plugin configurations

- Update manifest-schema.md with latest schema changes
- Refine CLAUDE.md documentation
- Update MCP-WIKIJS, PLUGIN-PMO, PLUGIN-PROJMAN references
- Fix wikijs_client.py configuration
- Update plugin configs for cmdb-assistant and projman
- Add root .mcp.json for project-level MCP configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/cmdb-assistant/.claude-plugin/plugin.json

@@ -37,12 +37,6 @@
       "file": "agents/cmdb-assistant.md"
     }
   },
-  "mcpServers": {
-    "netbox": {
-      "description": "NetBox API integration via MCP",
-      "configFile": ".mcp.json"
-    }
-  },
   "configuration": {
     "required": [
       {