idz: Hoist userdb code

src/idz/userdb/decoder/loadEventInfo.ts

@@ -0,0 +1,12 @@
+import { LoadEventInfoRequest } from "../request/loadEventInfo";
+import { AimeId } from "../../../model";
+
+loadEventInfo.msgCode = 0x00be;
+loadEventInfo.msgLen = 0x0010;
+
+export function loadEventInfo(buf: Buffer): LoadEventInfoRequest {
+  return {
+    type: "load_event_info_req",
+    aimeId: buf.readUInt32LE(0x0004) as AimeId,
+  };
+}