Get a template

curl --request GET \
  --url https://app.vern.so/api/v1/templates/{template_slug} \
  --header 'x-api-key: <api-key>'

{
  "slug": "<string>",
  "name": "<string>",
  "description": "<string>",
  "columns": [
    {
      "name": "<string>",
      "description": "<string>",
      "required": true,
      "unique": true,
      "strictRule": "<string>",
      "linkRule": [
        {
          "templateId": "<string>",
          "columnName": "<string>"
        }
      ]
    }
  ]
}