Include filter, more verbose content returned from variables.json endpoint

Include filter, more verbose content returned from variables.json endpoint

When using the variables.json endpoint today, the returned data does not include the type of variable used (e.g., boolean, string, img, color).  As a result, filtering through complex email variables is more onerous than necessary. Could the variable type be added to the data that's returned, and ideally a parameterized filter when calling the endpoint?