feat(routers): add API endpoints for agents and skills

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

backend/app/routers/system.py

@@ -12,4 +12,4 @@ async def get_system_status():
 @router.get('/config')
 async def get_system_config():
     """Get public system configuration."""
-    return SystemService().get_config()
+    return await SystemService().get_config()