Write totals per identifier in loader.neon

[ruudk]

Currently, the loader.neon file contains a comment saying "total x errors".

Then it starts including the baselines per identifier.

But it would be really nice if it would also add comments for the total per identifier.

This way, you can look at this file, and immediately see which identifier is the biggest one for example.

It's a small thing, but it makes it nicer 😁

PS: I know the total's are also visible per identifier file, but that requires me to click through 100 of files.