Adding a simple readme to document where I am getting my tutorial information from.

1. Basic GODOT tutorial to get the groundwork setup came from this youtube video: https://www.youtube.com/watch?v=Luf2Kr5s3BM&list=PL_Dyl6F6kywP-MkT5915F_U5q7lYdbWUA&index=18&t=3835s

2. Health bars seem to use progress bars, so health and other progress notifiers come from this tutorial: https://www.youtube.com/watch?v=UEJcUnq2dfU