Summary

Add the bépo (known as fr-bepo in Debian) keyboard layout to set system option keyboard-layout

Use case

Improves accessibility for people using this layout.

Additional information

It does not seem possible to use this layout currently, even using regular Debian commands.
I am obviously preaching for the layout I am using, but many more layouts are missing from set system option keyboard-layout. Wouldn't it be simpler to map the available options with the layouts from vanilla Debian?