Add support for Lock branch - read-only

There is options that can set a branch as read-only, is some case when we finish works in specific version/branch it can be useful.

Docs:
https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-protected-branches/about-protected-branches#lock-branch

There is also in api: `lock_branch`
https://docs.github.com/en/rest/branches/branch-protection?apiVersion=2022-11-28#update-branch-protection

I don't know if it possible to implement also for ASF GitBox.

Start with the .asf.yaml documentation and schema, then trace how branch-related options are consumed by ASF GitBox. Check the linked GitHub branch-protection API documentation, especially lock_branch, and determine whether the option can be represented and applied. Done means the configuration supports read-only branch locking and its behavior is verified.

Written by the indexing model from the issue text.