Adds functionality to communicate with the Archipelago Mega Mix client

Archipelago is a multiworld randomizer, allowing several game randomizers to be combined together, or played individually.

For Diva, you receive a random selection of songs, and beating songs with either unlock more songs, or give you Leeks, when you collect enough leeks, you unlock your goal song, completing the goal song means you win!

Implementation based on ShareDiva by RocketRacer

Archipelago: https://archipelago.gg/

Archipelago Discord: https://discord.com/invite/8Z65BR2

(You can find the diva channel in future-game-design)

Diva AP world - https://github.com/Cynichill/DivaAPworld

Source Code: https://github.com/Cynichill/Diva-Archipelago-Mod