[Documentation] repos using the refarch

### Relevant documentation

Other

### Problem description (optional)

Listing of repod using the refarch

### Desired solution

* github tags https://github.com/topics/it-at-m-refarch

### Additional context (optional)

_No response_

### No duplicate

- [x] I confirm that this issue is not a duplicate

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

Start by reviewing the GitHub topic at https://github.com/topics/it-at-m-refarch and locating the project's documentation entry point for repository listings. Done means the documentation lists repositories using the refarch and reflects the relevant topic results.

Written by the indexing model from the issue text.