Initial dotfiles setup with GNU stow

Centralize dotfiles from ~ into stow packages:
- zsh: .zshrc, .zshenv
- git: .gitconfig
- nvim: init.lua, lua/, plugin/, after/, lazy-lock.json
- tmux: tmux.conf, session-list.sh
- karabiner: karabiner.json
- ghostty: config.ghostty
- claude: CLAUDE.md, settings.json, settings.local.json, statusline.sh, 30 commands

claude/.claude/commands/local_review.md

@@ -0,0 +1,48 @@
+---
+description: Set up worktree for reviewing colleague's branch
+---
+
+# Local Review
+
+You are tasked with setting up a local review environment for a colleague's branch. This involves creating a worktree, setting up dependencies, and launching a new Claude Code session.
+
+## Process
+
+When invoked with a parameter like `gh_username:branchName`:
+
+1. **Parse the input**:
+   - Extract GitHub username and branch name from the format `username:branchname`
+   - If no parameter provided, ask for it in the format: `gh_username:branchName`
+
+2. **Extract ticket information**:
+   - Look for ticket numbers in the branch name (e.g., `eng-1696`, `ENG-1696`)
+   - Use this to create a short worktree directory name
+   - If no ticket found, use a sanitized version of the branch name
+
+3. **Set up the remote and worktree**:
+   - Check if the remote already exists using `git remote -v`
+   - If not, add it: `git remote add USERNAME git@github.com:USERNAME/humanlayer`
+   - Fetch from the remote: `git fetch USERNAME`
+   - Create worktree: `git worktree add -b BRANCHNAME ~/wt/humanlayer/SHORT_NAME USERNAME/BRANCHNAME`
+
+4. **Configure the worktree**:
+   - Copy Claude settings: `cp .claude/settings.local.json WORKTREE/.claude/`
+   - Run setup: `make -C WORKTREE setup`
+   - Initialize thoughts: `cd WORKTREE && humanlayer thoughts init --directory humanlayer`
+
+## Error Handling
+
+- If worktree already exists, inform the user they need to remove it first
+- If remote fetch fails, check if the username/repo exists
+- If setup fails, provide the error but continue with the launch
+
+## Example Usage
+
+```
+/local_review samdickson22:sam/eng-1696-hotkey-for-yolo-mode
+```
+
+This will:
+- Add 'samdickson22' as a remote
+- Create worktree at `~/wt/humanlayer/eng-1696`
+- Set up the environment