Fix console reader issues

[djspiewak]

Three issues! First, loads of commands can crash under certain circumstances, such as when cloned without tags. Wrapping everything in Try should fix this. Second, grepping git status is very much the wrong way to look for uncommitted changes. This is why git status -s exists. Third, the logger is very chatty, so I made it configurable and dropped the default level to Debug.

This is blocking typelevel/cats-effect#2942

[lightbend-cla-validator]

Hi @djspiewak,

Thank you for your contribution! We really value the time you've taken to put this together.

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[armanbilge]

Not an independent review since I'm a CE maintainer, but changes here are at the very least reasonable and definitely applicable to our use if not everyone else's. The default log level is of course a matter of opinion :)

Politely pinging @hughsimpson and @blast-hardcheese for additional review (if you are willing and able! :) who were involved with the original PR adding this feature in #168.

[blast-hardcheese]

These are sensible improvements on a known hacky workaround. Other than the toOption's making it harder to track down issues where things don't work well, this looks good to me. (In the error cases, do we still get info to stderr?)