Da Fast F(p)icker: a non-fzf picker which still feels faster.

TODO: desc

Why is the name DFF?
Well, in the random project directory, it was project D(4), version F(5) (yes, I needed to rewrite it five times before being happy with the algorithm), but DF is already a tool, so just repeat the last letter, and thus we get DFF.

Donation link where?
Here... Or well, it's actually here... No wait, it's here.