[FEAT]: Add choice to either have a fix wallpaper or only insert a company logo

[smirta]

Description

If I were introducing potos at my company, I'd leave the freedom to change wallpapers to the employees. But I might want to add a company logo overlay.

Don't know if that's possible in Potos, but I did that on Fedora and it's nice :)

https://fostips.com/custom-background-logo-fedora/

$ for i in $(gsettings list-keys org.fedorahosted.background-logo-extension); do echo "gsettings get org.fedorahosted.background-logo-extension $i: " `gsettings get org.fedorahosted.background-logo-extension $i`; done
gsettings get org.fedorahosted.background-logo-extension logo-always-visible:  false
gsettings get org.fedorahosted.background-logo-extension logo-border:  uint32 50
gsettings get org.fedorahosted.background-logo-extension logo-file:  '/usr/local/share/adfinis-logo/adfinis_cd_maskottchen_def_frontal_farbe.png'
gsettings get org.fedorahosted.background-logo-extension logo-file-dark:  '/usr/local/share/adfinis-logo/adfinis_cd_maskottchen_def_frontal_farbe.png'
gsettings get org.fedorahosted.background-logo-extension logo-opacity:  uint32 255
gsettings get org.fedorahosted.background-logo-extension logo-position:  'bottom-right'
gsettings get org.fedorahosted.background-logo-extension logo-size:  12.0

Additional Information

No response