## What's the problem this PR addresses?

ESM loaders aren't supported by the sdks because we only
`require().setup()` but we don't `register()` the ESM loader hook.

Fixes #6219

## How did you fix it?

- Add support for ESM loaders to the SDK.

- Check whether the `findPnpApi` function could be found in the `module`
builtin. If not, tries to setup the environment accordingly. This is
because in the case of the SDK, the subprocesses have been created
without the `--require .pnp.loader.mjs` flag, so the PnP runtime won't
be setup.

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…nfig