feat: Add PlayerManagement GM interface and clean repository

- Add comprehensive PlayerManagement component for GMs
- Add all GM API endpoints for player CRUD operations
- Add comprehensive test suite with 14 tests
- Clean up .gitignore to exclude logs, backups, core dumps
- Update README with setup instructions and documentation
- Add setup.sh script for easy project initialization

This provides a complete GM interface for managing players without
the large files that were blocking the previous push.

setup.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Deathwatch Roller Setup Script
+echo "🎲 Setting up Deathwatch Roller..."
+
+# Check if Node.js is installed
+if ! command -v node &> /dev/null; then
+    echo "❌ Node.js is not installed. Please install Node.js (v18+) first."
+    exit 1
+fi
+
+echo "✅ Node.js $(node --version) found"
+
+# Install dependencies
+echo "📦 Installing dependencies..."
+npm install
+
+# Check if PM2 is installed globally
+if ! command -v pm2 &> /dev/null; then
+    echo "⚠️  PM2 not found. Installing PM2 for production deployment..."
+    npm install -g pm2
+fi
+
+# Create necessary directories
+mkdir -p database/sqlite
+mkdir -p public/avatars
+
+# Initialize database (it will be created automatically on first server start)
+echo "🗄️  Database will be initialized on first server start"
+
+echo ""
+echo "🎉 Setup complete!"
+echo ""
+echo "To start development:"
+echo "  npm start              # Start React dev server"
+echo "  npm run server        # Start backend server (in another terminal)"
+echo ""
+echo "To start production:"
+echo "  npm run build         # Build for production"
+echo "  npm run pm2:start     # Start with PM2"
+echo ""
+echo "Access the application at: http://localhost:3000"
+echo "Backend API available at: http://localhost:5000"