[Feature Request] Add XTC file extensions support for eBook category

[aaakadhim]

Overview

Some unique e-readers, like the XTeink X3 and X4, make use of the XTC file extension for e-readers. When I download a .xtc file, I would love it if it could be recognized as an e-book, like many of the other e-book file extensions that are already supported.

Thank you!

[w2sv]

Sure, no problem