Addition of a --dev-watch cli arg so that when working on add-ons you can continually scaffold an app when changes are detected

- add --dev-watch cli arg e.g. --dev-watch ./frameworks/react-cra
- add --no-install cli arg - skips install deps. Needed so we aren't installing deps when package.json doesn't change in --dev-watch

- Replace emoji-based logging with cleaner tree-style output
- Add visual hierarchy for build progress and file changes
- Show inline diffs with proper indentation
- Reduce visual noise while maintaining all important information
- Create silent environment for initial app creation to avoid duplicate output

- Add comprehensive guide for using the --dev-watch feature
- Include example workflow with real command examples
- Document auto-rebuild and live reload capabilities
- Update pnpm-lock.yaml after merge