Add more static typing

[Joy-less]

Thanks for making this great addon.

I noticed there were some declarations that didn't use static typing, so I added static typing to the remaining declarations.

There are also some automatic additions to the .import files from Godot 4.5, which you're free to remove if you would prefer to ignore.

I license the changes in this pull request to the public domain.

[98teg]

Hi! Thank you so much for this and the following contributions, this would require increasing the minimal Godot version, but I'm not against it