feat: add new-with-env app to create project and open Ghostty

fix: pass absolute project path to nix develop in terminal app

fix: find Ghostty app bundle on macOS

fix: handle Ghostty Linux-only in nixpkgs for terminal app

feat: add nix run .#terminal app for one-command Ghostty launch

feat: add starship prompt, zsh, and ghostty config to template

feat: replace greet stub with todo list app, fix biome config

fix: complete template with project files, skills, and safe init

feat: initial superclaude — sandboxed Claude Code for Bun/TS projects