ScreenEffects

• Changed how datapacks register screen effects.
  • You will now define your own storage containing the screen effect definitions.
  • Once you have done that you can run the scrfx:add_screen_effects function which take in a storage and a path argument.
• Changed callbacks.
  • Instead of having only two options on where to run commands, You can now run commands on any frame you like.
  • The middle and end fields have been replaced with one callbacks field because of this.
  • It is a compound which contains key value pairs, the key being the frame number and the value being the command.

You can read more about this inside README.md#registering-the-screen-effects.