Separate the dispatch and game servers (pt. 1)

gacha is still broken, handbook still needs to be done

src/main/java/emu/grasscutter/server/dispatch/PacketIds.java

@@ -0,0 +1,10 @@
+package emu.grasscutter.server.dispatch;
+
+/* Packet IDs for the dispatch server. */
+public interface PacketIds {
+    int LoginNotify = 1;
+    int TokenValidateReq = 2;
+    int TokenValidateRsp = 3;
+    int GachaHistoryReq = 4;
+    int GachaHistoryRsp = 5;
+}