Merge remote-tracking branch 'origin/main' into feature/length_based_batch_sampling

examples/Getting_to_know_Llama.ipynb

examples/quickstart.ipynb

...es/datasets/grammar_dataset/grammar_dataset_process.ipynb

src/llama_recipes/utils/train_utils.py

tests/test_finetuning.py

tests/test_train_utils.py