Install conventional commits for contributing.md

[yangwao]

Ref

• https://www.conventionalcommits.org/en/v1.0.0/
• https://www.youtube.com/watch?v=KjYBh7rq0-Y
• maybeee? https://gitmoji.dev/
• is this same https://robinpokorny.github.io/git3moji/
• maybbeeeee https://gist.github.com/parmentf/035de27d6ed1dce0b36a

[roiLeo]

• 👀 vscode gitmoji extension