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/gif-sticker-maker/references/captions.md

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+# Default Captions by Language
+
+Select captions based on user's conversation language.
+
+| Action | English | Spanish | French | German | Chinese | Japanese | Korean |
+|--------|---------|---------|--------|--------|---------|----------|--------|
+| Waving | Hi~ | ¡Hola! | Salut~ | Hallo~ | 嗨~ | やあ~ | 안녕~ |
+| Laughing | LOL | Jajaja | MDR | Haha | 哈哈哈 | 笑 | ㅋㅋㅋ |
+| Crying | Boo-hoo | Buaaa | Snif | Heul | 呜呜呜 | えーん | 흑흑 |
+| Heart | Love ya | Te quiero | Je t'aime | Liebe | 爱你哦 | 大好き | 사랑해 |
+
+## Filename Convention
+
+| Action | Filename ID |
+|--------|-------------|
+| Happy waving | hi |
+| Laughing hard | laugh |
+| Crying tears | cry |
+| Heart gesture | love |
+
+## Custom Caption Guidelines
+
+- Keep captions short: 1-3 words work best
+- Actions auto-match caption meaning (e.g., "Sleepy" → yawning action)
+- Users can provide captions in any language

skills/gif-sticker-maker/references/requirements.txt

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+# Python dependencies
+requests>=2.28
+
+# System dependency (install separately):
+#   ffmpeg — brew install ffmpeg (macOS) / apt install ffmpeg (Ubuntu)