curl --request GET \
  --url https://api.specular.dev/branches/{id} \
  --header 'Authorization: Bearer <token>'

{
  "branch": {
    "id": "<string>",
    "projectId": "<string>",
    "name": "<string>",
    "state": "idle",
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z",
    "mcpUrl": "<string>",
    "appUrl": "<string>",
    "openApiSpec": "<string>"
  }
}