Feat/spreadsheet args

[isaac1345]

Important

Please provide Summary Request Here. Include:

1. Reference to the issue #
2. Description of the changes proposed

This References issue #164 and adds argument parsing.

The following arguments are accepted:
--input, -i: folder containing the xlsx files that need to be converted
--file, -f: The individual xlsx file to convert
--output, -o: The output folder to put the yaml files

Check List

• Code runs locally
• Tests pass
• New behavior has tests
• Documentation updated if behavior changed
• No secrets, credentials, or local-only paths committed
• Logging uses module-level loggers
• Exceptions and validation results follow engine convention

Other Comments?

[isaac1345]

I will be testing this a little more extensively, including:

• Test on folder input/output
• test on folder with invalid files
• test on empty folder
• test on invalid single file
• test on non-existent folders