feat: add configuration files and scripts for project setup ✨

🚀 Breaking Changes:
- Introduced new environment variables for GitLab API integration
- Added validation script for PR checks
- Updated package.json with new scripts for testing and formatting

📝 Details:
- Added .prettierrc and .eslintrc.json for code formatting and linting
- Created .env.example for environment variable setup
- Updated CHANGELOG.md with recent changes
- Added documentation for GitHub secrets setup

scripts/validate-pr.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+# PR Validation Script
+# This script runs all necessary checks before merging a PR
+
+set -e
+
+echo "🔍 Starting PR validation..."
+
+# Check if Node.js is installed
+if ! command -v node &> /dev/null; then
+    echo "❌ Node.js is not installed"
+    exit 1
+fi
+
+echo "📦 Installing dependencies..."
+npm ci
+
+echo "🔨 Building project..."
+npm run build
+
+echo "🧪 Running unit tests..."
+npm run test:unit
+
+echo "✨ Checking code formatting..."
+npm run format:check || {
+    echo "⚠️  Code formatting issues found. Run 'npm run format' to fix."
+    exit 1
+}
+
+echo "🔍 Running linter..."
+npm run lint || {
+    echo "⚠️  Linting issues found. Run 'npm run lint:fix' to fix."
+    exit 1
+}
+
+echo "📊 Running tests with coverage..."
+npm run test:coverage
+
+# Check if integration tests should run
+if [ -n "$GITLAB_TOKEN" ] && [ -n "$TEST_PROJECT_ID" ]; then
+    echo "🌐 Running integration tests..."
+    npm run test:integration
+else
+    echo "⚠️  Skipping integration tests (no credentials provided)"
+fi
+
+echo "🐳 Testing Docker build..."
+if command -v docker &> /dev/null; then
+    docker build -t mcp-gitlab-test .
+    echo "✅ Docker build successful"
+else
+    echo "⚠️  Docker not available, skipping Docker build test"
+fi
+
+echo "✅ All PR validation checks passed!"