No error reported when file provided in input does not exists

[LasneF]

Describe the bug
running spectral on an non existing file does return that all is fine

To Reproduce

spectral lint bob --ruleset .spectral.spectral.yaml

with no file called bob
return

"No results with a severity of 'error' found!"

Expected behavior
a message indicating that bob file does not exists and return error exit code

Environment (remove any that are not applicable):

• OS: Windows
• Spectral ; 6.11.1

Additional context
if i set a wrong ruleset i have a nice error message ,
"Could not read ruleset" , i would expect the same cannot read the api decription file