refactor: move nested skills to root + add ui-ux-pro-max + ConsentOS

- Extract 9 nested skills from website-creator/ to root skills/
- Remove duplicate seo-analyzers, seo-geo, seo-multi-channel from website-creator
- Add new ui-ux-pro-max skill with full UI/UX data
- Update install-skills.sh to sync properly
- Remove .DS_Store artifacts

Moved skills:
- api-and-interface-design
- banner-design
- brand
- design-system
- design
- frontend-ui-engineering
- slides
- spec-driven-development
- ui-styling

skills/design-system/scripts/slide-token-validator.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+"""
+Slide Token Validator (Legacy Wrapper)
+Now delegates to html-token-validator.py for unified HTML validation.
+
+For new usage, prefer:
+  python html-token-validator.py --type slides
+  python html-token-validator.py --type infographics
+  python html-token-validator.py                       # All HTML assets
+"""
+
+import sys
+import subprocess
+from pathlib import Path
+
+SCRIPT_DIR = Path(__file__).parent
+UNIFIED_VALIDATOR = SCRIPT_DIR / 'html-token-validator.py'
+
+
+def main():
+    """Delegate to unified html-token-validator.py with --type slides."""
+    args = sys.argv[1:]
+
+    # If no files specified, default to slides type
+    if not args or all(arg.startswith('-') for arg in args):
+        cmd = [sys.executable, str(UNIFIED_VALIDATOR), '--type', 'slides'] + args
+    else:
+        cmd = [sys.executable, str(UNIFIED_VALIDATOR)] + args
+
+    result = subprocess.run(cmd)
+    sys.exit(result.returncode)
+
+
+if __name__ == '__main__':
+    main()