new module: DREP_COMPARE

[jfy133]

Is there an existing module for this?

• [X] I have searched for the existing module

Is there an open PR for this?

• [X] I have searched for existing PRs

Is there an open issue for this?

• [X] I have searched for existing issues

Are you going to work on this?

• [ ] If I'm planning to work on this module, I added myself to the Assignees to facilitate tracking who is working on the module

[jfy133]

https://github.com/MrOlm/drep