python-eel
Added type stubs
I've added type stubs covering the vast majority of the Python side of the eel API.
I've chosen to use the more legacy List, Dict, etc. from the typing package rather than paramterized builtins to maximise support for earlier python versions (e.g. Python 3.6).
There were some occasions where the type annotation is probably too generous, but where it was either impractical to type precisely (e.g. _ws, and in the browser files get_path seem to be inconsistent) or not readily apparent what is appropriate. Apart from get_path() which is clear on a module-by-module basis, I've annotated these with typing.Any for now, but of course it might be good to narrow them further going forward.
Tested and seem to work for me with pyright in vscode. Can't imagine any issues due to the relative simplicity of this, but I've not tested the stubs with other typecheckers.
