feat: add --headless flag to cbx code for non-interactive use

fix: copy CLAUDE.md to /workspace and skills to claude user during setup

feat: setup auto-launches master Claude session (claude-master)

chore: remove unused init() and fmt import

refactor: use cobra for CLI, add -g/-p flags to code, add unit tests

feat: cbx code --github owner/repo to clone and start session

fix: update setup instructions and deploy summary for v0.3 flow

fix: configure Chrome Lite MCP during setup, not just activate

docs: rewrite README for v0.3.0 with updated workflow

Merge pull request #4 from vutran1710/feat/activate-sessions

feat: cbx activate spawns Claude sessions, add cbx code command

fix: add /usr/sbin to shell PATH for useradd and other sbin tools

fix: simplify user creation, include stderr in error message

fix: install cloudflared via apt repo instead of dpkg

fix: simplify cloudflare install to pure dpkg retry loop