Add comments and docstrings to main.py and api.py

[sweep-nightly]

Description

This PR adds comments and docstrings to the main.py and api.py files in order to improve code readability and maintainability. The comments and docstrings provide explanations and descriptions of the code functionality, imported modules, and data preprocessing steps.

Summary of Changes

main.py

• Added a module-level docstring explaining the purpose of the file and the steps involved in loading and preprocessing the MNIST dataset.
• Added comments above the import statements to explain the purpose of each imported module.
• Added a comment above the 'transform' variable to explain the purpose of the 'transforms.Compose' function and the specific transforms used.
• Added a comment above the 'trainset' variable to explain the purpose of the 'datasets.MNIST' function and its parameters.
• Added a comment above the 'trainloader' variable to explain the purpose of the 'DataLoader' function and its parameters.
• Added a docstring to the 'Net' class to provide an overview of the class and its methods, including a description of the model architecture and the forward pass.

api.py

• Added a module-level docstring explaining the purpose of the file and the functionality of the FastAPI application.
• Added comments above the import statements to explain the purpose of each imported module.
• Added a comment above the 'model' variable to explain the purpose of the 'Net' class and the 'load_state_dict' and 'eval' methods.
• Added a comment above the 'transform' variable to explain the purpose of the 'transforms.Compose' function and the specific transforms used.
• Added a docstring to the 'predict' function to provide an overview of the function, including a description of the image preprocessing steps and the model prediction.

These changes improve the code documentation and make it easier for developers to understand and maintain the codebase.

Fixes #11.

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Rollback Files For Sweep

• Rollback changes to src/main.py
• Rollback changes to src/api.py

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• Apply: All docstrings and comments should be up to date.
• Apply: Code should be properly formatted and indented.
• Apply: Variable and function names should be descriptive and follow a consistent naming convention.
• Apply: Imports should be organized and grouped together.
• Apply: There should be no unused imports or variables.
• Apply: Code should be properly commented and include docstrings for functions and classes.