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/forest-canopy.md

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+# Forest Canopy
+
+A natural and grounded theme featuring earth tones inspired by dense forest environments.
+
+## Color Palette
+
+- **Forest Green**: `#2d4a2b` - Primary dark green
+- **Sage**: `#7d8471` - Muted green accent
+- **Olive**: `#a4ac86` - Light accent color
+- **Ivory**: `#faf9f6` - Backgrounds and text
+
+## Typography
+
+- **Headers**: FreeSerif Bold
+- **Body Text**: FreeSans
+
+## Best Used For
+
+Environmental presentations, sustainability reports, outdoor brands, wellness content, organic products.