Add support for colors in Markdown

[TheRealVira]

User could use this as the following:

>c:blue::text:<

Which then would get translated to:

<span style="color:blue">text</span>

Might be a need feature to bring some color in text and it would help to make some highlighting (aside from using the underline function). My implementation should support inline text color, but please check it for errors as I am a bit rusty with my C skills.

If you need anything else, please let me know! I am not sure if this is still active, but it's worth a try I guess 😄

[TheRealVira]

💇‍♀️