[Utilities] print the name of scalar constraints in print(::ModelLike)

[odow]

Closes #2335

cc @WalterMadelim

I need to think about what to do for vector constraints.

[blegat]

Maybe we can print it after the set, like in PSDCone() (name). It is consistent with the (1) you have at the end of the equations in LaTeX's environment equation or align. Then we could do the same for scalar constraint for consistency but then the names are not aligned but at least the start of the functions are aligned

This would give

   ScalarQuadraticFunction{Float64}-in-LessThan{Float64}
     0.0 + 1.0 y - 1.0 z + 2.0 x² <= 1.0 (c5)

    VectorOfVariables-in-SecondOrderCone
     ┌ ┐
     │x│
     │y│
     └ ┘ in SecondOrderCone(2) (c3)

[odow]

That's a reasonable solution. Thoughts, @WalterMadelim?

[WalterMadelim]

Good morning, @odow. I think it’s also pretty to print at the end of a line after a constraint. It’s consistent with paper publications. And it seems to save the space of a line on screen for those Vector constraints.

We don’t worry about whether the name is easily seen or not, as long as it’s printed. We can use ctrl+f to search the name we want to inspect, e.g., in an Julia REPL, in Vscode.

[odow]

Updated