Add git worktree support via git r worktree

[Copilot]

git-rbs had no way to create worktrees interactively — users had to drop out to the shell and remember the git worktree add syntax manually.

Changes

• rbs.go

  • Extracted shared listBranches() and branchSelectPrompt() helpers — eliminates duplication between Run() and RunWorktree()
  • Added RunWorktree(): presents the same interactive branch selector, then automatically derives the worktree path as ../<branch-name> (with / → -) and runs git worktree add <path> <branch> — no manual path input required
  • Switched both Run() and RunWorktree() from Output() to CombinedOutput() so git's stderr is surfaced on failure

• cmd/rbs/main.go

  • Dispatches to RunWorktree() when the first argument is worktree

Usage

git r worktree
# → interactive branch selector
# → worktree path is automatically set to ../my-feature
# → runs: git worktree add ../my-feature my-feature

[bubunyo]

@copilot the command should work by identifying worktree automatically

[Copilot]

@copilot the command should work by identifying worktree automatically

Done in 375294a. The worktree path is now derived automatically from the selected branch name (../<branch-name>, with / replaced by -), so there's no manual path prompt — just pick a branch and the worktree is created immediately.