reworked container access (never throw, multi-field access, return values, operator), added package storage

src/main/java/carpet/script/bundled/ModuleInterface.java

@@ -1,7 +1,12 @@
 package carpet.script.bundled;
 
+import net.minecraft.nbt.Tag;
+
 public interface ModuleInterface
 {
     String getName();
     String getCode();
+    default boolean isInternal() {return true; }
+    default Tag getData(String file) {return null; }
+    default void saveData(String file, Tag globalState) {}
 }