feat: ✨ Implement Pix MCP server

Author: faguzzi3-boop

.env.example

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+# Efí (Gerencianet) Configuration
+EFI_CLIENT_ID=your_efi_client_id
+EFI_CLIENT_SECRET=your_efi_client_secret
+EFI_SANDBOX=true
+
+# Server Configuration
+PORT=3000
+NODE_ENV=development
+
+# Future providers (Phase 2)
+# CIELO_CLIENT_ID=your_cielo_client_id
+# CIELO_CLIENT_SECRET=your_cielo_client_secret
+# ADYEN_API_KEY=your_adyen_api_key

.eslintrc.json

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+{
+  "parser": "@typescript-eslint/parser",
+  "extends": [
+    "eslint:recommended"
+  ],
+  "plugins": ["@typescript-eslint"],
+  "parserOptions": {
+    "ecmaVersion": 2022,
+    "sourceType": "module"
+  },
+  "rules": {
+    "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
+    "@typescript-eslint/no-explicit-any": "warn",
+    "prefer-const": "error",
+    "no-var": "error",
+    "no-undef": "off",
+    "no-unused-vars": ["error", { "argsIgnorePattern": "^_" }]
+  },
+  "env": {
+    "node": true,
+    "es2022": true
+  }
+}

.github/workflows/ci.yml

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+name: CI/CD Pipeline
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    
+    - name: Install dependencies
+      run: npm ci
+    
+    - name: Run linter
+      run: npm run lint
+    
+    - name: Run tests
+      run: npm test
+    
+    - name: Build project
+      run: npm run build
+    
+    - name: Test build
+      run: node dist/index.js --help || true
+
+  security:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Run security audit
+      run: npm audit --audit-level=high
+    
+    - name: Check for vulnerabilities
+      run: npm audit --audit-level=moderate
+
+  build-docker:
+    runs-on: ubuntu-latest
+    needs: [test, security]
+    if: github.ref == 'refs/heads/main'
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+    
+    - name: Build Docker image
+      run: |
+        npm ci
+        npm run build
+        docker build -t pix-mcp-server:latest .
+    
+    - name: Test Docker image
+      run: |
+        docker run --rm pix-mcp-server:latest node -e "console.log('Docker build successful')"

.gitignore

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+# Dependencies
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Build outputs
+dist/
+build/
+
+# Environment variables
+.env
+.env.local
+.env.production
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+logs/
+*.log
+
+# Runtime data
+pids/
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage/
+
+# Temporary folders
+tmp/
+temp/

.prettierrc

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+{
+  "semi": true,
+  "trailingComma": "es5",
+  "singleQuote": true,
+  "printWidth": 100,
+  "tabWidth": 2,
+  "useTabs": false
+}