# Description

Fix configclass dict conversion for torch tensors

Up to v1.2.0 if a configclass would contain a list/tuple of torch
tensors it would be left as is.

\#1227 changed the behavior of converting lists/tuples in a dict, which
means that currently torch tensors are converted to an empty dict,
effectively losing all contained data.

The underlying issue is that `torch.tensor.__dict__` returns an empty
dict, which was (luckily) ignored previously because we did not convert
the contents of lists.

This MR fixes this by treating torch tensors specially. I don't like
having a special case for a non-builtin class but given that
IsaacLab is heavily married with torch tensors I think it's ok in this
case.

Since currently the behavior is different between 1.2 and 1.3: can we
cherry pick this change to the 1.3 branch?

## Type of change

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

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] 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
Co-authored-by: Kelly Guo <kellyg@nvidia.com>