Should we support adding freshness tests to some sources?

[bastienboutonnet]

Not much to add here other than I think there might be a case for adding easily some freshness tests to sources when they are added or defined for the first time or when we do something like

dbt-sugar sources --project dbt_prediction

We could have something like a quick summary of the sources in this project and offer the user the ability to enforce a freshness test.

I think it's not urgent but definitely a nice feature to think about as I think we tend to forget adding freshness tests on sources far too often when we're in need of bringing new sources quickly while developping.