List collections

curl --request GET \
  --url https://api.tedro.io/api/content/collections \
  --header 'x-workspace-id: <api-key>' \
  --cookie better-auth.session_token=

{
  "items": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "description": "<string>",
      "workspaceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "createdAt": "<string>",
      "updatedAt": "<string>"
    }
  ]
}