feat: add icons library with 100 curated Lucide icons (#66)

- Add icons.csv with 100 essential Lucide React icons
- Add icons domain to search engine for icon lookups
- Bump CLI version to 1.6.0

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "uipro-cli",
-  "version": "1.5.1",
+  "version": "1.6.0",
   "description": "CLI to install UI/UX Pro Max skill for AI coding assistants",
   "type": "module",
   "bin": {