add Base64Factory

Author: mrjimin

Core/src/main/kotlin/io/github/grassproject/framework/item/factory/Base64Factory.kt

@@ -0,0 +1,11 @@
+package io.github.grassproject.framework.item.factory
+
+import io.github.grassproject.framework.item.ItemHandler
+import io.github.grassproject.framework.util.item.ItemEncoder
+import org.bukkit.inventory.ItemStack
+
+object Base64Factory : ItemHandler.Factory {
+    override fun create(id: String): ItemStack {
+        return ItemEncoder.decode(id)
+    }
+}