Add --verbose command line flag and improve logging

[guysmoilov]

Logging levels should be standardized, and generally more logs added to the most verbose level. After doing that, a --verbose flag can greatly help in debugging issues

[kbolashev]

Alternatively, a DAGSHUB_LOG_LEVEL command that allows you to set the logging level

[kbolashev]

All the CLI commands have a -v flag that makes the output more and more verbose