[Question] Unable to find Open API Spec for Carbon Service

### API Spec link

https://github.com/Azure/azure-rest-api-specs/tree/main/specification

### API Spec version

NA

### Question/Query

Hi, I am unable to find Open API Spec for Carbon Service. As the api is in preview, is there a plan to add it in the near future. Also are you open to me creating a PR for this?

Documentation URL [https://learn.microsoft.com/en-us/rest/api/carbon/carbon-service?view=rest-carbon-2023-04-01-preview](url)

### Environment

_No response_

Start with the specification directory and the Carbon Service documentation URL linked in the issue. Determine whether the preview API already has a specification or an approved contribution path; the work is only defined once maintainers confirm the scope and acceptance criteria for adding it.

Written by the indexing model from the issue text.