List agents

curl --request GET \
  --url https://api.vocobase.com/api/v2/agent/all \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "agents": [
      {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "agent_name": "<string>",
        "prompt": "<string>",
        "voice_id": "<string>",
        "language": "<string>",
        "agent_type": "inbound",
        "intro_message": "<string>",
        "enable_recording": true,
        "kb_threshold": "low",
        "kb_include_summaries": true,
        "kb_result_format": "<string>",
        "kb_enable_llm_processing": true,
        "kb_llm_system_prompt": "<string>",
        "project_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "document_count": 123,
        "status": "active",
        "created_at": "2023-11-07T05:31:56Z",
        "updated_at": "2023-11-07T05:31:56Z"
      }
    ],
    "total": 123,
    "limit": 123,
    "offset": 123
  }
}