feat: Add deployment improvements and GitHub Pages support

[mno-go]

🚀 Enhancement: Deployment Improvements

This PR adds comprehensive deployment support for the Semantic Diff application, making it easy to deploy to GitHub Pages using multiple methods.

✨ What's Added

• 📦 gh-pages Package: Added gh-pages as a dev dependency for easy manual deployment
• 🔧 Deploy Script: Added npm run deploy command to package.json
• 📝 Enhanced Documentation: Comprehensive deployment instructions in README
• 🏷️ Package Metadata: Updated package.json with proper name and description

🛠️ Deployment Methods Supported

1. GitHub Actions (Recommended) - Automatic deployment on push to main
2. gh-pages CLI - Manual deployment with npm run deploy
3. Manual Build - Build locally and push dist/ folder

📋 Usage

# Method 1: GitHub Actions (after setting up secrets)
# Just push to main branch!

# Method 2: Manual with gh-pages
export VITE_OPENAI_API_KEY="your-key"
export GITHUB_PAGES_BASE="/test/"
npm run build
npm run deploy

# Method 3: Manual build
npm run build
# Then push dist/ to gh-pages branch

🔧 Configuration Required

• Add OPENAI_API_KEY to repository secrets for GitHub Actions
• Set GITHUB_PAGES_BASE environment variable for correct asset paths
• Enable GitHub Pages in repository settings

📁 Files Changed

• package.json - Added gh-pages dependency and deploy script
• package-lock.json - Updated with new dependencies
• README.md - Enhanced with detailed deployment instructions

🎯 Ready for Production

This PR makes the Semantic Diff application production-ready with multiple deployment options to suit different workflows and preferences.

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Note: GitHub Actions workflow file will be added in a separate commit due to OAuth scope requirements for workflow files.

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Pull Request opened by Augment Code with guidance from the PR author