fix: remove agents field from all plugin.json files

Claude Code v2.0.44 doesn't support the agents field in plugin manifests.
Removed from: clarity-assist, pr-review, projman, claude-config-maintainer, cmdb-assistant

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

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

@@ -18,6 +18,5 @@
     "dcim"
   ],
   "commands": ["./commands/"],
-  "agents": ["./agents/"],
-  "mcpServers": "./.mcp.json"
+  "mcpServers": ["./.mcp.json"]
 }