DEV: [PATCH v5 3/4] rust: configfs: add a sample demonstrating configfs usage

Add a sample to the samples folder, demonstrating the intended use of the
Rust configfs API.

Link: https://lore.kernel.org/r/20250227-configfs-v5-3-c40e8dc3b9cd@kernel.org
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
3 files changed