Make dual page reader a per-manga setting

[curche]

Describe your suggested feature

Sometimes, you have one manga that you'd rather read in dual page (like shounen action comedy manga on mangaplus) while you have others that can just be read single page (or rather, the dual pages are already stitched correctly, for eg, on mangadex)

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 an extension, I should be opening an issue in the extensions repository.
• [X] I have updated the app to version 1.9.4.
• [X] I will fill out all of the requested information in this form.

[curche]

Yes this is something I realized while I was coping with #930