List projects

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

{
  "success": true,
  "data": [
    {
      "id": "proj_abc123",
      "name": "Default",
      "description": null,
      "is_default": true,
      "agent_count": 3,
      "created_at": "2026-01-15T10:30:00.000Z",
      "updated_at": "2026-01-15T10:30:00.000Z"
    },
    {
      "id": "proj_def456",
      "name": "Client A",
      "description": "Agents for Client A",
      "is_default": false,
      "agent_count": 2,
      "created_at": "2026-03-01T08:00:00.000Z",
      "updated_at": "2026-03-01T08:00:00.000Z"
    }
  ]
}