Add: Syntax Highlighting for literal escapes

[lettuceDestroyer]

• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the discussions and believe that my question is not already covered.

Feature Request

I'm not sure if this is the right place to address this but it would be nice if the literal escape would be highlighted.

In VSCode a raw command looks like this:

Now I'd like that the \ before the as well as the " have a different colour, similar to what happens in C# code.