fix(cli): address CodeRabbit review feedback

- Change error handling to warn level for non-critical Claude setup failures - Remove all explicit return types per repo guidelines - Remove duplicate docblock comment - Update type safety guidance to prefer inferred return types - Add getDlxCmd helper for package manager compatibility (npx/bunx/pnpm dlx) - Change interface to type alias in component template - Fix tree structure ASCII art with proper markers 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kareemschultz