Is your feature request related to a problem? Please describe.

After generating a configuration for a source plugin, if you try to run a sync you'll get:

Then you'll need to:

1. cloudquery gen destination postgresql
2. Manually update the source yml with the destination

Since having at least one destination is a requirement, we should make it work more seamlessly

Describe the solution you'd like

Either always add a default destination, or prompt the user to select from a list

Describe alternatives you've considered

Manually updating source configuration files