chore(): marked clients for deprecation

src/spot-client-v3.ts

@@ -17,6 +17,10 @@ import BaseRestClient from './util/BaseRestClient';
 
 /**
  * REST API client for newer Spot V3 APIs.
+ * @deprecated WARNING
+ * These endpoints are being switched off gradually and are expected to be completely turned off by the end of 2024.
+ * They may stop working at any point before then.
+ * Please update your code as soon as possible to use the V5 APIs instead.
  */
 export class SpotClientV3 extends BaseRestClient {
   getClientType() {