Create a collection

Creates a collection using the [Postman Collection v2.1.0 schema format](https://schema.postman.com/collection/json/v2.1.0/draft-07/docs/index.html). **Note:** - If you do not include the `workspace` query parameter, the system creates the collection in your "My Workspace" workspace. - For a complete list of available property values for this endpoint, use the following references available in the [Postman Collection Format documentation](https://schema.postman.com/collection/json/v2.1.0/dr...