[Feature Request] - work-items relations add for branch

i can add work-item relation to child, parent, but not to git branch.
i want to be able do same like in web ui - link already created branch or create new branch.

**Describe the solution you'd like**
```az boards work-item relation add --id $WORKITEM_ID --relation-type Branch --object-id $BRANCH_OBJECTID```

**Additional context**
artifact-link of git branch after creation in web-ui has id not only object-id, which i see only in ```az boards work-item relation show``` not in ```az repos ref list -r some-repository```