Don't abort if exit code is nonzero

[TylerJang27]

Is your feature request related to a problem? Please describe.
Please add a flag (or default behavior) to not error when the --execute command exits with a nonzero status. Right now if I do something like freeze --execute "mkdir .", I get the error:

   ERROR  Something went wrong
                              
  exit status 1

Describe the solution you'd like
Sometimes I want to capture an image output of commands that have a nonzero status.

Describe alternatives you've considered
I've tried doing something like wrapping the execute in bash -c '... || true', but depending on the complexity of the command, sometimes this doesn't work and it isn't very scalable.

Additional context
Love the tool, but would like to see a few more refinements for --execute support!