update about.md to have better info

Author: AlphiiGD

about.md

@@ -1,2 +1,8 @@
-## Overview
-Add some splash text to the GD main menu!
+# Overview
+Add some splash text to the GD main menu!
+
+# Creating Custom Splashes
+To create custom splashes, create a file somewhere and give it
+the file extension `.splash`, `.txt`, or `.text`. Making a splash
+is as simple as just writing one per line. However, there are some
+additional features documented in the [GitHub Repository](https://github.com/AlphiiGD/Splash-Text).

mod.json

@@ -10,7 +10,7 @@
 	"name": "Splash Text!",
 	"version": "v1.1.0",
 	"developer": "Alphii",
-	"description": "",
+	"description": "Minecraft-style splashes in the main menu!",
 	"tags": ["enhancement", "offline"],
 	"links": {
 		"community": "https://discord.gg/tVPtwJexSX",