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/app-builder/templates/express-api/TEMPLATE.md

@@ -0,0 +1,83 @@
+---
+name: express-api
+description: Express.js REST API template principles. TypeScript, Prisma, JWT.
+---
+
+# Express.js API Template
+
+## Tech Stack
+
+| Component | Technology |
+|-----------|------------|
+| Runtime | Node.js 20+ |
+| Framework | Express.js |
+| Language | TypeScript |
+| Database | PostgreSQL + Prisma |
+| Validation | Zod |
+| Auth | JWT + bcrypt |
+
+---
+
+## Directory Structure
+
+```
+project-name/
+├── prisma/
+│   └── schema.prisma
+├── src/
+│   ├── app.ts           # Express setup
+│   ├── config/          # Environment
+│   ├── routes/          # Route handlers
+│   ├── controllers/     # Business logic
+│   ├── services/        # Data access
+│   ├── middleware/
+│   │   ├── auth.ts      # JWT verify
+│   │   ├── error.ts     # Error handler
+│   │   └── validate.ts  # Zod validation
+│   ├── schemas/         # Zod schemas
+│   └── utils/
+└── package.json
+```
+
+---
+
+## Middleware Stack
+
+| Order | Middleware |
+|-------|------------|
+| 1 | helmet (security) |
+| 2 | cors |
+| 3 | morgan (logging) |
+| 4 | body parsing |
+| 5 | routes |
+| 6 | error handler |
+
+---
+
+## API Response Format
+
+| Type | Structure |
+|------|-----------|
+| Success | `{ success: true, data: {...} }` |
+| Error | `{ error: "message", details: [...] }` |
+
+---
+
+## Setup Steps
+
+1. Create project directory
+2. `npm init -y`
+3. Install deps: `npm install express prisma zod bcrypt jsonwebtoken`
+4. Configure Prisma
+5. `npm run db:push`
+6. `npm run dev`
+
+---
+
+## Best Practices
+
+- Layer architecture (routes → controllers → services)
+- Validate all inputs with Zod
+- Centralized error handling
+- Environment-based config
+- Use Prisma for type-safe DB access