Add a feature Syncyomi

[Character95]

Describe your suggested feature

for syncing chapters/tracking across devices...

Other details

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 official extension, I should be opening an issue in the extensions repository.
• [X] I have updated the app to version 0.15.2.2.
• [X] I will fill out all of the requested information in this form.