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/golden-hour.md

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+# Golden Hour
+
+A rich and warm autumnal palette that creates an inviting and sophisticated atmosphere.
+
+## Color Palette
+
+- **Mustard Yellow**: `#f4a900` - Bold primary accent
+- **Terracotta**: `#c1666b` - Warm secondary color
+- **Warm Beige**: `#d4b896` - Neutral backgrounds
+- **Chocolate Brown**: `#4a403a` - Dark text and anchors
+
+## Typography
+
+- **Headers**: FreeSans Bold
+- **Body Text**: FreeSans
+
+## Best Used For
+
+Restaurant presentations, hospitality brands, fall campaigns, cozy lifestyle content, artisan products.