Atlas metadata print out

[FedeClaudi]

Okay so I've added a __rich_console__ method to the BGAtlas class, that's what's used by rich's Console for printing objects. If users use the builtin print function than __str__ will be used instead, which prints the same but without colors.

This is what it looks like:

and with the normal print

and __repr__ returns:

[nickdelgrosso]

Wow, looks great!

[vigji]

Nice, looks good to me!

The only things I would raise is that

1. Probably we want this to go in the atlas Core class, for it to be available also for custom atlases from local data - all info should be available;
2. Maybe it's a bit lot of "cosmetic" code to go in the main data-centric class, and could be refactored out in an utility function; but this is entirely subjective, and I'm happy to keep it this way and maybe move it later, it's a really minor change.

They're beautiful!

[FedeClaudi]

Sure, I can move it to a function no problem

[FedeClaudi]

aight, moved the __ methods to Core and the bulk of the rich code to a utility function

[vigji]

Great! Good for me to merge, thanks for this!