Add option to delete the original file on upload

[AhmarZaidi]

Summary

Fixes #1564

This pull request introduces a new option in the Modern Image Format plugin settings to delete the original JPEG/PNG files after conversion to modern image formats like AVIF or WebP. This will help save disk space by removing the original files. Also, removed the old extension suffix (eg: -jpg, -png) from the filename.

Relevant technical choices

• Added a new checkbox option in the settings page to enable or disable the deletion of original JPEG/PNG files after conversion.

• Updated the original_image metadata when the delete option is enabled so that the original image link in Attachment details popup doesn't give 404.

• Added checks to ensure that the original file is only deleted if new image files have been generated. Also taken care of the case where the original image itself is in avif or webp format.

• Update the existing test cases by removing -jpg/-jpeg/-png from filenames checks.

Screenshot:

[github-actions]

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Co-authored-by: AhmarZaidi <[email protected]>
Co-authored-by: adamsilverstein <[email protected]>
Co-authored-by: felixarntz <[email protected]>
Co-authored-by: westonruter <[email protected]>
Co-authored-by: JosVelasco <[email protected]>

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[adamsilverstein]

Hey @AhmarZaidi - I appreciate your effort here contributing to the plugin. However, I'm not in favor of including this feature, see my comment on the issue and feel free to disagree if you feel I missed some important aspect. I know you put work into this, so thanks for that!