Add colonthreeing@SealSeal mod (#307)

Adds the mod SealSeal by me. Source can be found
[here](https://github.com/colonthreeing/SealSealBalatro/tree/1.1.0)

It's a mod for making the seals on cards look like seals (the animal).

mods/colonthreeing@SealSeal/description.md

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+# SealSeal
+Adds seals (the animal) for your seals (the stamp on your cards)!
+
+Recommended to be used with the mod Malverk but it can run without it.

mods/colonthreeing@SealSeal/meta.json

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+{
+  "title": "SealSeal",
+  "requires-steamodded": true,
+  "requires-talisman": false,
+  "categories": ["Resource Packs"],
+  "author": "colonthreeing",
+  "repo": "https://github.com/colonthreeing/SealSealBalatro",
+  "downloadURL": "https://github.com/colonthreeing/SealSealBalatro/releases/latest/download/SealSeal.zip",
+  "folderName": "SealSeal",
+  "version": "1.1.0",
+  "automatic-version-check": true
+}