[Suggestion]: Use TextMate grammar files for syntax highlighting

Description of the problem or steps to reproduce

The current state of the syntax highlighting is mediocre at best, and terrible at worst
Given that the leading editor (VSCode) is using TextMate grammar, is it possible to 'swipe' their complex tmLanguage files to get much better highlighting?

Here is the vscode interpreter solution in javascript
it's neatly written and not hard to understand
https://github.com/microsoft/vscode-textmate
so it should be rewritten in go which while a big task im not certain it would be extremely comlicated

This is a huge request and may only stay as a 'nice to have' for maybe 2.0? 3.0?

In any case I wouldn't disregard this idea.

Specifications

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The issue names microsoft/vscode-textmate as the reference implementation but does not name a micro file, test, or entry point. First inspect the existing syntax-highlighting implementation and compare it with the referenced JavaScript interpreter; the scope, compatibility plan, and validation criteria still need definition before completion can be judged.