Request for adding new tools to the toolbelt

[rickyson96]

Hi @nvie.
First of all, I want to thank you for these amazing tools. Found this while in search for the CLI version of Magit's git-spinoff.

That being said, I have some requests for new tools that may interest you!

• Magit branch's git-spinout -> Basically git-spinoff + checkout back to previous branch
• Magit merge's git-merge-into -> Merging current branch into target branch, then remove the current branch Ongoing PR Add git-merge-directly-to #41
• Magit merge's git-merge-absorb -> Merging target branch into the current branch, then remove the targeted branch
• Magit merge's git-merge-preview -> Not really sure how this one works though. Maybe by checking for possible merge conflicts and showing merged diff?

If these new features suit you, I can try to create PRs for them later!
Thanks!

References:

• Magit branch: https://magit.vc/manual/magit/Branch-Commands.html
• Magit merge: https://magit.vc/manual/magit/Merging.html