Yash/python bash automation

[y0shK]

• [x] Test that JPG images are created
• [x] Add test images to repository
• [x] Ensure GitHub Actions tests pass (on local machine)
• [x] Add tests for correct file and folder structure (on local machine)
• [x] Handle failure for file/folder structure gracefully
• [x] Handle output folder cases for empty and non-empty output folders
• [ ] Create a test folder and throw an exception for non-empty, non-forced folders
• [ ] Create test folder and throw exception (don't delete the test_output folder ahead of time) without a -f flag
• [ ] Check if image in CSV doesn't exist, and handle that exception (use -s skip flag to skip missing images, or throw error if -s is not provided)
• [x] Use argparse to create a CLI tool to run tests