[pass] fzf 4 pass

[pc re]

Due to my lack of understanding about bash completion, this idea of mine
to integrate pass to fzf was doomed from the start.
Because the default  pass completion, that comes with pass was was
overwritten.

Maybe it is best to adapt /usr/share/bash-completion/completions/pass

So it detects pass **<TAB>

Also add an environment variable (PASSWORD_STORE_FUZZY).
So any fuzzy search program can be used. Not just fzf. A lot to choose
from out there.

Sorry again for bothering you guys.