Regex within `where()`

[Andrew]

Wrap Typst syntax in backticks instead of pinging users on the forum.

@Andrew

If a piece of code is used inside a text paragraph, use single backticks (`) instead of triple ones (or instead of quotes). Like @bibref (instead of @bibref username) or #bibliography() (instead of bibliography tag).

@reknih

If you need to highlight a code or math mode snippet instead, the language tags typc and typm do that, respectively.