idz: Rename model Id<> to ExtId<>

src/idz/decoder/saveStocker.ts

@@ -1,7 +1,7 @@
 import { bitmap } from "./_bitmap";
 import { chara } from "./_chara";
 import { RequestCode } from "./_defs";
-import { BackgroundCode, Id } from "../model/base";
+import { BackgroundCode, ExtId } from "../model/base";
 import { CarSelector } from "../model/car";
 import { Profile } from "../model/profile";
 import { SaveStockerRequest } from "../request/saveStocker";
@@ -12,7 +12,7 @@ saveStocker.msgLen = 0x00c0;
 export function saveStocker(buf: Buffer): SaveStockerRequest {
   return {
     type: "save_stocker_req",
-    profileId: buf.readUInt32LE(0x0004) as Id<Profile>,
+    profileId: buf.readUInt32LE(0x0004) as ExtId<Profile>,
 
     backgrounds: bitmap(buf.slice(0x0008, 0x002c)) as BackgroundCode[],
     selectedCar: buf.readUInt16LE(0x009c) as CarSelector,