[REQUEST] Add "Show init" feature from bpytop

[sj-dan]

Is your feature request related to a problem? Please describe. No, I just like the feature from bpytop because it looks cool.

Describe the solution you'd like I want a config option similar to bpytop that shows a startup screen when you run btop.

Describe alternatives you've considered I've just been using bpytop instead for the time being.