Add type annotations

[Heribert17]

Is your feature request related to a problem? Please describe.

It would be good to have type annotations for all public functions so that pyright or similar tools are able to check the parameter.
Pyright tries to automatically guess and add type hints but that takes hours and isn't allways correct.

Describe the solution you'd like

All public function definitions have type annotations.

Describe alternatives you've considered

I tried to let pyright generate stub files but after 8 hours pyright is still analysing 417 files. The files for cx_freeze where generated in minutes.

Additional context

No response

[israel-dryer]

@Heribert17, this is a good idea. I had wanted to do this anyway, so now is as good a time as any. The only caveat is that I'll need to make sure that I use annotations that are supported in python 3.8 since that is still under support.

It looks like there is a way to support 3.8 + between using the typing_extensions and the standard typing modules for later version.

[Heribert17]

If I can help you (testing, etc.) please let me know.

[israel-dryer]

@Heribert17, for sure. I might do this along with a 2.0 release. I want to reorganize the project so that it's easier to maintain and update. However, I know there will be some minor minor breaking changes for some imports, but nothing too serious. I believe I'll also need to subclass the ttk widgets as well instead of overriding the ttk versions by brute force, which is actually not a great practice anyway. This will make it much easier to type kwargs, and all the other contructor arguments as well on the standard widgets.