add "save stocker"

src/idz/handler/saveStocker.ts

@@ -0,0 +1,13 @@
+import { SaveStockerRequest } from "../request/saveStocker";
+import { GenericResponse } from "../response/generic";
+import { World } from "../world";
+
+export function saveStocker(
+  w: World,
+  req: SaveStockerRequest
+): GenericResponse {
+  return {
+    type: "generic_res",
+    status: 1, // ignored
+  };
+}