Split Manga Volumes for Kindle Compatibility

[feahnthor]

I encountered an issue where users can't upload single file versions of mangas (like cbz or pdfs) to their Kindle due to the 50 MB email limit. The goal of this task is to solve that by checking a reliable source for the chapters that belong in each volume and then splitting the output files accordingly. This way, each volume is broken down into smaller files grouped by chapters, making them easier to upload.