import { estypes } is not working anymore in an ESM file

### Regression report Importing `estypes` in an ESM file fails since `9.3.0`. ### Last working version 9.2.1 ### To reproduce In any ESM file, import `estypes`: ```ts import type { estypes } from '@elastic/elasticsearch' ``` It produces the following error: ``` Module '"@elastic/elasticsearch"' has no exported member 'estypes'. ``` The reason being TS opens `./esm/index.d.ts` that has not `estypes` and not `./index.d.ts` which has it. I believe `./esm/index.d.ts` should contain `export * as estypes from './api/types.js'`. ### Expected behavior It should compile without an issue. ### Node.js version 24.13.0 ### TypeScript version 5.9.3 ### Elasticsearch client version 9.3.0 ### Elasticsearch server version N/A ### Operating system _No response_ ### Any other relevant environment information. _No response_