feat: datagen

Author: omrih4

src/main/resources/messages/MinecraftDevelopment.properties

@@ -84,6 +84,7 @@ creator.ui.load_at.option.startup=Startup
 creator.ui.load_at.option.postworld=Post World
 creator.ui.soft_depend.label=Soft Depend:
 creator.ui.use_mixins.label=Use &Mixins:
+creator.ui.use_datagen.label=Use Datagen:
 creator.ui.split_sources.label=Split Sources:
 creator.ui.java_version.label=Java Version:
 creator.ui.jdk.label=JDK: