chore: adjust syntax to python type hints

[deathaxe]

This PR provides required adjustments for pyright's syntax to work with sublimehq/Packages#3736.

Unfortunately some of mensioned PRs changes break current syntax and I found no sane way around it.

[deathaxe]

sublimehq/Packages#3736 has been merged and might be released with one of then next ST dev builds.

[jfcherng]

What will happen for current stable build users if we merge and release this?

[deathaxe]

This being merged requires another 415x- version prefix to be defined to restrict them to those ST builds shipping new python syntax including PR 3736. The resulting changes to pyright's syntax are not forward or backward compatible. This PR won't work with ST4150 but without this PR pyright's syntax will fail with any upcomming ST415x build. I know that's unfortune, but I didn't found a way to work around it.

I haven't investigated impact of implementing sublimehq/Packages#3793 so far.

[jfcherng]

In that case, I would choose to vendor (like https://github.com/sublimelsp/LSP-pyright/blob/st3/syntaxes/Python.sublime-syntax) Python syntax file with PR #3736 until there is a new stable release. Because LSP-pyright already branches ST 3 release and ST 4 release, I wouldn't like to create yet another one.

And if we vendor it, this can be kind of being merged right now.

[deathaxe]

Sounds like a plan to make transition smoother.

[jfcherng]

Let's change

extends: Packages/Python/Python.sublime-syntax

to

extends: Packages/LSP-pyright/syntaxes/Python.sublime-syntax