feat: Report for specific contracts only

[clemsos]

Hello, many thanks for the cool plugin.

I have a folder with many contracts, and it will be very handy to be able to pass a contract name - or an array of names - so to get reporting only for specific contracts files - maybe as args to export() ?

[marceljay]

If this is already possible, could the team provide info in the docs?

[sebastiantf]

This should be possible using the outputSelection config. But I couldn't get it to working with the plugin