Added mod listing data class

core/src/mindustry/mod/ModListing.java

@@ -0,0 +1,19 @@
+package mindustry.mod;
+
+/** Mod listing as a data class. */
+public class ModListing{
+    public String repo, name, author, lastUpdated, description;
+    public int stars;
+
+    @Override
+    public String toString(){
+        return "ModListing{" +
+        "repo='" + repo + '\'' +
+        ", name='" + name + '\'' +
+        ", author='" + author + '\'' +
+        ", lastUpdated='" + lastUpdated + '\'' +
+        ", description='" + description + '\'' +
+        ", stars=" + stars +
+        '}';
+    }
+}