feat: add 33 skills from vudovn/antigravity-kit

- Added: api-patterns, app-builder, architecture, bash-linux, behavioral-modes,
  clean-code, code-review-checklist, database-design, deployment-procedures,
  docker-expert, documentation-templates, game-development, geo-fundamentals,
  i18n-localization, lint-and-validate, mobile-design, nestjs-expert,
  nextjs-best-practices, nodejs-best-practices, parallel-agents,
  performance-profiling, plan-writing, powershell-windows, prisma-expert,
  python-patterns, react-patterns, red-team-tactics, seo-fundamentals,
  server-management, tailwind-patterns, tdd-workflow, typescript-expert,
  vulnerability-scanner
- Updated README: skill count 179 → 223
- Added credit for vudovn/antigravity-kit (MIT License)

Source: https://github.com/vudovn/antigravity-kit

skills/api-patterns/SKILL.md

@@ -0,0 +1,81 @@
+---
+name: api-patterns
+description: API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.
+allowed-tools: Read, Write, Edit, Glob, Grep
+---
+
+# API Patterns
+
+> API design principles and decision-making for 2025.
+> **Learn to THINK, not copy fixed patterns.**
+
+## 🎯 Selective Reading Rule
+
+**Read ONLY files relevant to the request!** Check the content map, find what you need.
+
+---
+
+## 📑 Content Map
+
+| File | Description | When to Read |
+|------|-------------|--------------|
+| `api-style.md` | REST vs GraphQL vs tRPC decision tree | Choosing API type |
+| `rest.md` | Resource naming, HTTP methods, status codes | Designing REST API |
+| `response.md` | Envelope pattern, error format, pagination | Response structure |
+| `graphql.md` | Schema design, when to use, security | Considering GraphQL |
+| `trpc.md` | TypeScript monorepo, type safety | TS fullstack projects |
+| `versioning.md` | URI/Header/Query versioning | API evolution planning |
+| `auth.md` | JWT, OAuth, Passkey, API Keys | Auth pattern selection |
+| `rate-limiting.md` | Token bucket, sliding window | API protection |
+| `documentation.md` | OpenAPI/Swagger best practices | Documentation |
+| `security-testing.md` | OWASP API Top 10, auth/authz testing | Security audits |
+
+---
+
+## 🔗 Related Skills
+
+| Need | Skill |
+|------|-------|
+| API implementation | `@[skills/backend-development]` |
+| Data structure | `@[skills/database-design]` |
+| Security details | `@[skills/security-hardening]` |
+
+---
+
+## ✅ Decision Checklist
+
+Before designing an API:
+
+- [ ] **Asked user about API consumers?**
+- [ ] **Chosen API style for THIS context?** (REST/GraphQL/tRPC)
+- [ ] **Defined consistent response format?**
+- [ ] **Planned versioning strategy?**
+- [ ] **Considered authentication needs?**
+- [ ] **Planned rate limiting?**
+- [ ] **Documentation approach defined?**
+
+---
+
+## ❌ Anti-Patterns
+
+**DON'T:**
+- Default to REST for everything
+- Use verbs in REST endpoints (/getUsers)
+- Return inconsistent response formats
+- Expose internal errors to clients
+- Skip rate limiting
+
+**DO:**
+- Choose API style based on context
+- Ask about client requirements
+- Document thoroughly
+- Use appropriate status codes
+
+---
+
+## Script
+
+| Script | Purpose | Command |
+|--------|---------|---------|
+| `scripts/api_validator.py` | API endpoint validation | `python scripts/api_validator.py <project_path>` |
+