Add manual migration option

[FLCnhzmry]

Describe your suggested feature

Could you please add an option in the settings for 'Use Mihon's migration scheme (or manual migration scheme) by default when migrating a single comic'?

Other details

The reasons are as follows: 1. In some cases, certain comics have multiple other versions in their comic source, but SY's migration removes the comic source of that comic, preventing migration within the same comic source; 2. SY's default migration scheme is very efficient when migrating multiple comics, but it is less efficient than Mihon's scheme when migrating a single comic. In my usage case, the comics matched by SY's automatic migration are sometimes very inaccurate, and the automatic migration process cannot be interrupted. I can only choose manual migration after the automatic migration search is complete, which wastes time. (I used a translator for this translation, which may lead to inaccuracies or misunderstandings in conveying the language, and I apologize for that 😰)

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open or closed issue.
• I have written a short but informative title.
• I have updated the app to version 1.11.0.
• I will fill out all of the requested information in this form.