Refactor script.py: Add typing and comments

[sweep-ai]

Description

This PR refactors the script.py file in order to improve code readability and maintainability. The changes include adding type hinting and comments to the functions and main section of the script.

Summary of Changes

• Added type hinting and comments to the get_image function in script.py. The url parameter is now hinted as a string and the return type is hinted as an Image object. Comments explain that this function fetches an image from a given URL and returns it as an Image object.
• Added type hinting and comments to the scat_image function in script.py. The output and real_png_url parameters are now hinted as strings, and the position parameter is hinted as a tuple. The function does not return anything. Comments explain the purpose and steps of this function.
• Added comments to the main section of the script, explaining that it takes user input for the real PNG URL and the output file name, and then calls the scat_image function with these inputs and a fixed position.
• Reviewed the entire script.py file for any other areas where typing and comments could be improved. Added type hinting and comments as necessary.

These changes improve the readability and maintainability of the code, making it easier to understand and modify in the future.

Fixes #1.

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