Major improvements to the textmate grammar

[thetarnav]

I've been making a lot of small changes to the grammar since last time, but only now I think they are stable enough to share.

More and more tokens have their proper scopes guessed from just the syntax. I think that almost every token could be guessed accurately, with few exceptions to leave to semantic tokens.

Here are few changes:

• typeid is now a support.type.primitive, instead of a keyword, similar to other builtin types
• Added $ and % as operators
• every type annotation (foo: Bar(Baz)) will assume only types can be on the right side
• assignments using :: that aren't followed by strict, proc, etc. will have a variable.other.constant scope

• added block labels
• Every function call now has a meta.function-call scope.

• mark as types some tokens that can only be types

And few small fixes and improvements, like using --- in forgein code blocks.

I've been vscode with those changes for a while and tried to go over odin and old codebases to see if there are some bugs with highlighting, but it seems to be working pretty well. But it probably would be smart for someone else to try them as well.

[DanielGavin]

Sweet thanks.

I'll try and get it on my computer locally and use it for a while.