add copyright headers

src/main/java/com/falsepattern/chunk/api/ChunkDataRegistry.java

@@ -1,3 +1,15 @@
+/*
+ * -------------------------------------------------------------------------------
+ * @author FalsePattern
+ *
+ * Copyright 2023
+ *
+ * All rights reserved.
+ * Distribution of the software in any form is only allowed with
+ * explicit, prior permission from the owner.
+ * -------------------------------------------------------------------------------
+ */
+
 package com.falsepattern.chunk.api;
 
 import com.falsepattern.chunk.internal.ChunkDataRegistryImpl;