List spaces

curl --request GET \
  --url https://api.supermemory.ai/v1/spaces \
  --header 'Authorization: Bearer <token>'

{
  "spaces": [
    {
      "uuid": "<string>",
      "name": "<string>",
      "ownerId": "<string>",
      "isPublic": true,
      "createdAt": "2023-11-07T05:31:56Z",
      "permissions": {
        "canRead": true,
        "canEdit": true,
        "isOwner": true
      }
    }
  ]
}