Suggest to run `dashmate setup`

[shumkov]

Expected Behavior

When you run any commands except setup with a fresh setup, dashmate should recommend to run setup command first.

Current Behavior

Since new configs are created with base config as default we can see many different errors depend on a command you run.

Possible Solution

• Initialize dashmate configuration with default config as null
• Recommend to to run the setup command in error message when default group or default config is not set:

Error: Default config is not set. Please use '--config' option or set default config

[pshenmic]

Related https://github.com/dashpay/platform/issues/487

[shumkov]

Fixed in v0.24