Fix not overwriting a folder when compressing

[marcospb19]

And also rename ask_to_create_file function.

$ mkdir a.tar
$ echo a > a.txt
$ ouch compress a.txt a.tar
Do you want to overwrite 'a.tar'? [Y/n] 
[ERROR] failed to create file `a.tar`

[marcospb19]

Very small refac, the functions in the question.rs suffer from bad naming because most of them do more than one thing, so it's weird to give them a proper name.

[figsoda]

lgtm

[marcospb19]

This also solves a bug, so I will rename the PR and add it to the CHANGELOG as a bug fix.

[figsoda]

btw, now ci takes a long time for the cross compilations to complete, so you might want to skip ci in the changelog update if you want to save some time