Vscode Theme Darcula Versions Save

Add php variable rule (#15) Add dart class rule (#20)

• Revert background color to the default (fixes #3)
• Change the line highlight color according to the background color change

• Add icon for vscode extension
• Add triple-slash directive colorization
• Add regex capture group colorization
• Fix wrong operator colorization on file scoped code
• Change XML/HTML string color to match other string
• Change line highlight color & background color to match the original theme (fixes #2)

• Improve CSS/SCSS colorization

• Improve JSX/TSX colorization
• Improve regex class colorization