Replace Franz with Ferdi

[L4yer]

Hello could I suggest that franz be replaced with Ferdi.

https://getferdi.com/

Thank you

[Luong Vo]

it s a fork. I would like to keep them both. Can you open a PR to help me add Ferdi?

[Dimitrios Pappas]

Thank you for your contribution. Add Ferdium (Fork of Ferdi) #577.