Add a ziped version of the loader to releases that can be used for self-setup.

> Thanks for the details.
> The current released versions of the mod loader are for Godot 3.5. WindowKill is created with a custom build of Godot 4.2. The creator of the game released the custom engine build used here:
> https://github.com/torcado194/godot/tree/windowkill
>
> There is a post on the Godot Discord Showcase, you can follow that for a bit more information.
>
> Regarding the zip downloading, that's a good point. We should add a zip to the release that can be used for the self-setup.

_Originally posted by @KANAjetzt in https://github.com/GodotModding/godot-mod-loader/issues/356#issuecomment-1830635025_