add custom icons to build

[ItsbaileyX3525]

This allows the user to add custom icons to their game so it shows something other than the python icon when the game is running

[pokepetter]

This seems useful, but I'm a bit reluctant to put a 6MB .exe in the repo.

[ItsbaileyX3525]

I see what you mean, 6MB is a 12% increase. As it is though I'm unaware of any other way. I'll review this pr when I'm able to and look for a different method however for the time being. However despite this it does work and if you do decide to merge it that would be great, custom icons very good!

[ItsbaileyX3525]

@pokepetter upon review I've found a more lightweight resource editor called "rcedit" which is the same godot uses, it is approx. 1MB in size and should be able to change the icon however I will have to rewrite the code when I'm next available to

[ItsbaileyX3525]

The method uses "rcedit" instead of resource hacker. Rcedit is more lightweight than resource hacker saving 5MB. It still will increase the size of the repo by 1MB which I hope is ok. The new method may fail however due to the fact that the old icons can't be deleted but in each test I ran the icon always changed properly when running the python file.

[ItsbaileyX3525]

When it gets to the point of adding the icon I accidentally added a useless import with pathlib as it is already imported prior. However I do not think this causes any issues and should be ok to just keep in for now as it doesn't negatively effect the code.