idz: Hoist userdb code

src/idz/userdb/decoder/updateProvisionalStoreRank.ts

@@ -0,0 +1,13 @@
+import { UpdateProvisionalStoreRankRequest } from "../request/updateProvisionalStoreRank";
+
+updateProvisionalStoreRank.msgCode = 0x0082;
+updateProvisionalStoreRank.msgLen = 0x0010;
+
+export function updateProvisionalStoreRank(
+  buf: Buffer
+): UpdateProvisionalStoreRankRequest {
+  return {
+    type: "update_provisional_store_rank_req",
+    aimeId: buf.readUInt32LE(0x0004),
+  };
+}