[Sweep Rules] Add docstrings to data_augmentation.py

[ ] 👍 Sweep Did Well
[ ] 👎 Sweep Needs Improvement

I created this PR to address this rule:

"Add docstrings to all functions and file headers."

Description

This PR adds docstrings to the data_augmentation.py file in order to provide documentation and improve code understanding. Docstrings have been added to the following functions and blocks:
Added a docstring to the _get_augmentation_sequence function in data_augmentation.py. The docstring provides a brief description of the function's purpose and usage.
Added docstrings to the added lines of code in the _get_augmentation_sequence function. Each line of code now has a corresponding docstring explaining its purpose.
Added a docstring to the write_label_file function in data_augmentation.py. The docstring provides a brief description of the function's purpose and usage.
Added a docstring to the __main__ block in data_augmentation.py. The docstring provides a brief description of the script's purpose and usage.

Summary of Changes

Added docstring to _get_augmentation_sequence function.
Added docstrings to the added lines of code in _get_augmentation_sequence function.
Added docstring to write_label_file function.
Added docstring to __main__ block.

Please review and merge these changes to improve code documentation and maintainability.