Markdown Reader 2.0.0

Markdown Reader 2.0.0 desktop release.\n\nDownloads:\n- macOS Apple Silicon: Markdown-Reader-2.0.0-macOS-arm64.zip\n\nmacOS beta install note:\nThis build is signed but not notarized yet. If macOS blocks it after download, move the app to Applications, then run:\n\nxattr -dr com.apple.quarantine "/Applications/Markdown Reader.app"\n\nA notarized build requires an Apple Developer ID certificate.