Include git-branch-backup, git-fix-author, git-name-stash,
git-name-stash-apply, git-rebase-on, and git-rename-branch in a new
bin/ directory. Update install.sh to symlink them into ~/bin and
document them in the README.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Cleaned up for new machine portability: removed hardcoded paths,
EOL packages, and redundant version managers. Consolidated NVM
loading, added work git identity support via includeIf.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
