Python 3.12 syntax support

[Bing-su]

I've noticed that there's no support for the type hinting syntax added in Python 3.12. It'd be great if you could add these syntaxes.

Monokai Pro

Default Dark+

Catppuccin Mocha

References

https://docs.python.org/3/library/typing.html#user-defined-generic-types

https://mypy.readthedocs.io/en/stable/generics.html