add mass migrate feature , to help with slow scanlations

[Weebguild]

Describe your suggested feature

a significant number of tachiyomi users miss the mass migrate feature which helped us to shift to other scanlations quickly , in bulk if we faced slow updates on a title , from one source

Acknowledgements

• [X] This is not a duplicate of an existing issue. Please look through the list of open issues before creating a new one.

[JIINNN01]

There's a reason it was removed from mihon and other forks you know. It leads to sources banning/breaking extensions.

[Weebguild]

There's a reason it was removed from mihon and other forks you know. It leads to sources banning/breaking extensions.

i didn't know that one , it was seriously helpful though and as far as i remember only tachiSY removed it , J2K still had it running , and mihons beta versions up until the latest 16.0 updates all had this feature, but it is true that send warning messages right now to prevent the same