[F-r] Fusion of EPUB entries feature

[Palloxin]

Describe your suggested feature

Ability to literally merge two or more epub entries in one. (then exporting as epub to create a whole thing should be possible) This is quite useful on novels separated by "Books" or Volumes (Book 1, Book 2, etc..) like here:

Other details

No response

Acknowledgements

• [X] I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open or closed issue.
• [X] I have written a short but informative title.
• [X] If this is an issue with a source, I should be opening an issue in the sources repository.
• [X] I have updated the app to version 2.0.0.
• [X] I will fill out all of the requested information in this form.