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/ocean-depths.md

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+# Ocean Depths
+
+A professional and calming maritime theme that evokes the serenity of deep ocean waters.
+
+## Color Palette
+
+- **Deep Navy**: `#1a2332` - Primary background color
+- **Teal**: `#2d8b8b` - Accent color for highlights and emphasis
+- **Seafoam**: `#a8dadc` - Secondary accent for lighter elements
+- **Cream**: `#f1faee` - Text and light backgrounds
+
+## Typography
+
+- **Headers**: DejaVu Sans Bold
+- **Body Text**: DejaVu Sans
+
+## Best Used For
+
+Corporate presentations, financial reports, professional consulting decks, trust-building content.