Improve thumbnail upload; force 16:9 aspect ratio and fix overflow issues

[xannyxs]

Description

To prevent overflow and future complications, this PR implements a forced resize of images to 1280x720 pixels (16:9 ratio). If the original image is smaller than this size, black bars are added to maintain the aspect ratio. This approach aligns with YouTube's thumbnail guidelines.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

Implementation Details

• Images are resized to 1280x720 pixels (16:9 ratio)
• Black bars are added if the original image is smaller than 1280x720
• This change addresses overflow issues and potential future complications

Future Work

Further in-depth work on this feature will be addressed in issue #868

Reference

The approach taken is based on YouTube's guidelines:

• Make your thumbnail 1280 by 720 pixels (16:9 ratio)
• Ensure that your thumbnail is less than 2MB
• Use a JPG, PNG, or GIF file format

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published

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Name	Status	Preview	Comments	Updated (UTC)
streameth-platform	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 26, 2024 1:36pm

[xannyxs]

Just noticing that uploading a thumbnail does not actually work before uploading a video

[xannyxs]

Found an new error in the tests. Will create an issue of it for another PR