Can I create a custom rule?

[12944qwerty]

I attempted this with AttributedString but I was unable to get any sort of customization with it. I'm hoping that it's possible with MarkdownUI.

I want to be able to render mentions differently than the rest of the text and the text needs to be replaceable. Similar to how in discord mentions go from <@id> to @user. I need to be able to do something like this as well as customize the background with padding (something I wasn't able to do with AttributedString).

[12944qwerty]

It's been a while but I decided to try creating something myself here. It's not the greatest implementation especially since it uses regex and won't work well for multi decoration purposes, but yeah.