Allows different userscripts to define functions that modify the game's code
As of
window.bonkCodeInjectors, and runs themCredits to https://github.com/kklkkj for creating this system where multiple extensions can edit different parts of Bonk.io' code.
Much of the code below was copied from or inspired by https://github.com/kklkkj/kklee/blob/master/src/runInjectors.js
Go thank kklkkj for this userscript
@run-at is document-start, so it runs before this script