Please add support for ebooks/epub editing programs like Sigil

[Emasoft]

Please add support for ebooks/epub editing programs like Sigil. I have many books in epub format on my iPad, but no software to edit them. Even having the console version of Sigil to batch processing them whitout GUI would be great.

https://github.com/Sigil-Ebook/Sigil

At the bare minimum please make this important utility work:

https://github.com/kevinboone/epub2txt2

Siri can read aloud books only in txt format.

Thanks!