[HfApi] Support resource_group_id in duplicate_repo (#5038)
* [HfApi] Support resource_group_id in duplicate_repo
Send `resourceGroupId` to the `/duplicate` endpoint (parity with `create_repo`) and expose it as `--resource-group-id` in `hf repos duplicate`.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* Apply suggestion from @Wauplin
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Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>