feat: add uxpro-cli for easy skill installation (#4)

* feat: add uxpro-cli for easy skill installation

- Add CLI tool (uxpro-cli) with commands: init, versions, update
- Support multiple AI assistants: claude, cursor, windsurf, antigravity, all
- Update README with CLI installation guide and usage examples
- Add CC BY-NC 4.0 license
- Update feature counts to accurate numbers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

* refactor: rename CLI from uxpro to uipro

- Package: uxpro-cli -> uipro-cli
- Command: uxpro -> uipro

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

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Co-authored-by: Claude <noreply@anthropic.com>

cli/.gitignore

@@ -0,0 +1,4 @@
+node_modules/
+dist/
+*.log
+.DS_Store