V3 Treesitter Engine

[vhyrro]

Would've been cooler if it were called the V8 engine but it's supposed to be the 3rd version of the parser so I can't just do that :p

It's finally here! The parser is so close to completion that I can already start migrating all of Neorg to the new engine. It's fast, it's much more reliable and it's 7.7x smaller than the previous iteration(s). And if it ever breaks, then it's simple to debug and actually consistent in when it errors in my experience. V1 would work for 90% of cases and then break super randomly in irreproducible environments.

Thanks to this we can also use treesitter as a source of truth for pandoc parsers or highlighting engines (looking at you, github) 👀

EDIT: It also now compiles natively on MacOS! Wohoo!!!

TODOs

There's a lot to do for this PR alone, and there's still some preliminary stuff. Here's the checklist:

• Implement inline maths and inline macros parsing and make conflicts work as intended within TS.
• Implement free-form attached modifiers in the parser. These are pretty hard, but they're about halfway there.
• Test the parser in MacOS environments to see if it compiles natively without hacks.
• Fix up some odd edge cases
• Put it all in Neorg!