Adds a handler that allows interrupting the training loop using ctrl + C.
Also registers a on_interrupt breakpoint so users can register callbacks to
be run on training loop interruption.
Note
In general you don't need to use these callback by yourself because it's always
included by default in fit.luz_module_generator().
See also
Other luz_callbacks:
luz_callback_auto_resume(),
luz_callback_csv_logger(),
luz_callback_early_stopping(),
luz_callback_keep_best_model(),
luz_callback_lr_scheduler(),
luz_callback_metrics(),
luz_callback_mixed_precision(),
luz_callback_mixup(),
luz_callback_model_checkpoint(),
luz_callback_profile(),
luz_callback_progress(),
luz_callback_resume_from_checkpoint(),
luz_callback_train_valid(),
luz_callback()