Release 2.1.0

Added

• Release automation: GitHub Actions workflow for automated releases via chat/AI assistant
• Improved .gitignore: Excludes auto-generated files (hotkeys.js, slides.json) and user data for better privacy
• Release documentation: Complete guide in RELEASE.md with step-by-step instructions

Changed

• Project rules: Updated with release process documentation and GitHub CLI integration
• Workflow structure: New release.yml workflow with manual dispatch support for automated releases

Fixed

• Privacy: Auto-generated files with user data no longer tracked in Git repository
• Release process: Streamlined release creation - AI assistant can now create releases directly via GitHub CLI