feat: add vscode matugen theme using extension

[haikalllp]

VS Code / VS Codium Theme

• Added templates:
  • vscode-colors
  • vscode-colors.json
• Update README.md to use the extension and setup for config.toml.
• Extension Links:
  • Marketplace - https://marketplace.visualstudio.com/items?itemName=haikalllp.matugen-theme
  • OVSX - https://open-vsx.org/extension/haikalllp/matugen-theme
  • Github - https://github.com/haikalllp/vscode-matugen-theme

Config Example:

# VS Code Matugen Theme extension
[templates.vscode-raw]
input_path = './templates/vscode-colors'
output_path = '~/.cache/matugen/vscode-colors'

[templates.vscode-json]
input_path = './templates/vscode-colors.json'
output_path = '~/.cache/matugen/vscode-colors.json'

Preview

[haikalllp]

Any feedback regarding the color mapping is welcome! Give it a try. :)