feat(): mark other V1 REST clients as deprecated

src/spot-client.ts

@@ -26,7 +26,8 @@ import { REST_CLIENT_TYPE_ENUM } from './util';
 import BaseRestClient from './util/BaseRestClient';
 
 /**
- * REST API client
+ * REST API client for the V1 bitget Spot APIs. These are the previous generation of Bitget's APIs and should be considered deprecated.
+ * These will be removed in a future release, once Bitget formally deprecates them.
  *
  * @deprecated use RestClientV2 instead
  */