Implement a new item drops system (#2112)

* 1

* Delete .gitattributes

* implement

* Update PacketDropHintNotify.java

* Update PacketWorldChestOpenNotify.java

* Update FileUtils.java

* Update PacketDropHintNotify.java

* Update WorldDataSystem.java

---------

Co-authored-by: Magix <27646710+KingRainbow44@users.noreply.github.com>

src/main/java/emu/grasscutter/game/drop/BaseDropData.java

@@ -0,0 +1,11 @@
+package emu.grasscutter.game.drop;
+
+import lombok.Getter;
+
+@Getter
+public class BaseDropData {
+    private int minLevel;
+    private String index;
+    private int dropId;
+    private int dropCount;
+}