Add support of LVM - Droidian an maybe other Linux for phone

[DavidFirefox]

Hi,
Thanks for your great work 👍 I use TWRP on all my phones and old phone !

I see TWRP support or had supported LVM, today Droidian (maybe other distribution to) use LVM.
Droidian is installed on a LVM, and we can't backup or restore it :(.

I would like to read the LVM partition with TWRP to modify if necessary and to backup it.

I see on Droidian telegram channel other people with phone supported by TWRP look at this to.

Do you know how is it possible ?
I know we have to modify for each device separately, but I thinks we can I have a common how to, to rebuild on each device we want.

Thanks in advance.