# Description

Introduced a custom argparse action to determine if command-line
arguments were explicitly provided by the user.

* Updated the device argument in AppLauncher to utilize ExplicitAction,
allowing for better handling of device settings based on user input.
* Adjusted device resolution logic to account for explicit device
specification, improving the default behavior when running in XR mode.

Fixes # (issue)

## Type of change

- Bug fix (non-breaking change which fixes an issue)

## Screenshots

Please attach before and after screenshots of the change if applicable.

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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Co-authored-by: Kelly Guo <kellyg@nvidia.com>
Co-authored-by: Kelly Guo <kellyguo123@hotmail.com>