Add fabric crasher for when julti as mod lol

src/main/java/xyz/duncanruns/julti/util/FabricCrashUtil.java

@@ -0,0 +1,10 @@
+package xyz.duncanruns.julti.util;
+
+public final class FabricCrashUtil {
+    private FabricCrashUtil() {
+    }
+
+    public void onInitialize() {
+        throw new RuntimeException("Julti is not supposed to be ran as a mod!");
+    }
+}

src/main/resources/fabric.mod.json

@@ -0,0 +1,14 @@
+{
+  "schemaVersion": 1,
+  "id": "fabric-crasher",
+  "version": "0.0.0",
+  "name": "This will crash your game!!!",
+  "description": "Crashes the game to let people know that this isn't a mod.",
+  "license": "MIT",
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      "xyz.duncanruns.julti.util.FabricCrashUtil::onInitialize"
+    ]
+  }
+}