I don't use Vim so can't give feedback but this is a great thing. If anyone can test it I'd link to it on my page.
I always used Notepad++ and had my own highlighting file, but couldn't get it precise due to how limited my ability to define it was, and the program itself would break syntax highlighting a few megabytes into a script anyway. I've switched to VSCode with its NScripter syntax file and won't be wasting my time with Notepad++ again.
>>2 As I'm aware, there're only two public syntax highlighting extensions for VSCode.
https://github.com/07th-mod/script-syntax-highlighters
https://marketplace.visualstudio.com/items?itemName=SkyMaker.nscripter-syntax
I only use VSCode as an IDE but the latter seems okay.