fix(cli): read version dynamically from package.json

- Remove hardcoded version string (was stuck at 1.9.0)
- Read version from package.json at runtime using ESM imports
- Bump version to 2.1.0

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "uipro-cli",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "CLI to install UI/UX Pro Max skill for AI coding assistants",
   "type": "module",
   "bin": {