Complete GitButler Virtual Branch

Virtual branch ready → snapshot → merge to main → cleanup → return.

<when_to_use>

• Virtual branch work is complete and ready to ship
• Tests pass and code is reviewed (if required)
• Ready to merge changes into main branch
• Need to clean up completed branches

NOT for: ongoing work, branches needing more development, stacks (complete bottom-to-top)

</when_to_use>

TL;DR

Using CLI (preferred): but oplog snapshot -> but push <branch> -> but pr new <branch> -> merge PR on GitHub -> but branch delete <branch>