Add Carroton@balatrodarkmode mod (#164)

This mod retextures most of the game's assets into dark mode versions.
It requires malverk to run. Screenshots are provided in the repo's
readme.

mods/Carroton@BalatroDarkMode/description.md

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+# Key Features
+
+- Dark versions of:
+	- Playing Card Backs
+	- Tarot Cards
+	- Planet Cards
+	-  Spectral Cards
+	- Card Backs
+- All Jokers retextured to dark versions
+- Splash screen and backgrounds darkened
+- Custom suit colors
+- Custom tag textures
+- Custom booster pack textures
+- Custom voucher textures
+
+# How To Use
+
+To use Balatro Dark Mode, you need to have **Malverk** installed. The pack contains two subpacks, a **Malverk** pack which contains the bulk of the textures and an **Extras** pack which contains small bits that are not supported by *Malverk*.  

mods/Carroton@BalatroDarkMode/meta.json

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+{
+  "title": "Balatro Dark Mode",
+  "requires-steamodded": true,
+  "requires-talisman": false,
+  "categories": ["Resource Packs"],
+  "author": "Carroton",
+  "repo": "https://github.com/CarrotonMan/balatrodarkmode",
+  "downloadURL": "https://github.com/CarrotonMan/balatrodarkmode/releases/download/latest/balatroDarkMode.zip",
+  "folderName": "balatroDarkMode",
+  "version": "1.1.0"
+}