feat: Import 35+ skills, merge duplicates, add openclaw installer

Major updates:
- Added 35+ new skills from awesome-opencode-skills and antigravity repos
- Merged SEO skills into seo-master
- Merged architecture skills into architecture
- Merged security skills into security-auditor and security-coder
- Merged testing skills into testing-master and testing-patterns
- Merged pentesting skills into pentesting
- Renamed website-creator to thai-frontend-dev
- Replaced skill-creator with github version
- Removed Chutes references (use MiniMax API instead)
- Added install-openclaw-skills.sh for cross-platform installation
- Updated .env.example with MiniMax API credentials

skills/theme-factory/themes/desert-rose.md

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+# Desert Rose
+
+A soft and sophisticated theme with dusty, muted tones perfect for elegant presentations.
+
+## Color Palette
+
+- **Dusty Rose**: `#d4a5a5` - Soft primary color
+- **Clay**: `#b87d6d` - Earthy accent
+- **Sand**: `#e8d5c4` - Warm neutral backgrounds
+- **Deep Burgundy**: `#5d2e46` - Rich dark contrast
+
+## Typography
+
+- **Headers**: FreeSans Bold
+- **Body Text**: FreeSans
+
+## Best Used For
+
+Fashion presentations, beauty brands, wedding planning, interior design, boutique businesses.