Update Multiplayer and added Multiplayer API

mods/Virtualized@MultiplayerAPI/description.md

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+# Balatro Multiplayer API
+
+This is an **WIP** Balatro Multiplayer API developed by virtualized.
+
+## How it works
+
+This API does not have documentation yet but you can take a look at the [example mods here](https://github.com/V-rtualized/BalatroMultiplayerAPI/tree/main/examples) or contact `virtualized` on discord for more infomation.
+
+## Multiplayer
+
+This API was developed for the Balatro Multiplayer mod, [check it out here](https://github.com/V-rtualized/BalatroMultiplayer) or join the discord at https://discord.gg/W22FEqVWsq

mods/Virtualized@MultiplayerAPI/meta.json

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+{
+  "title": "Multiplayer API",
+  "requires-steamodded": true,
+  "requires-talisman": false,
+  "categories": ["API", "Technical", "Miscellaneous"],
+  "author": "Virtualized",
+  "repo": "https://github.com/V-rtualized/BalatroMultiplayerAPI",
+  "downloadURL": "https://github.com/V-rtualized/BalatroMultiplayerAPI/archive/refs/heads/main.zip"
+}