Use Case
When working on a feature branch, I often need to create a variant worktree from
the same branch for parallel work. Currently, I must specify --from each time:
gtr new feature-variant --from feature-a
Proposal
Add a configuration option to use the current branch as the default source when
creating a new worktree:
gtr config set gtr.newBranch.fromCurrent true
gtr new feature-variant # Automatically uses current branch
Alternative
Alternatively, a --from-current flag would also work:
gtr new feature-variant --from-current