[Feature] Color highlighting

[aybe]

An amazing thing would be color themes like this:

Thank you!

[Mingun]

It will be great if the scheme for the color can be adjusted by declaratively describing the format in Kaitai Struct (for example)

[stef-levesque]

@Mingun seems there is already an extension for using Kaitai with VSCode. https://github.com/fudgepop01/kaitai_ide_vscode