feat: Support contract package type in nargo info command

[Ethan-000]

Description

Problem*

Resolves #1970
Resolves #2088

Summary*

fn main(x : Field, y : pub Field) {
    assert(x * 2 == y * 3);
}

contract Foo {
    fn double(x: Field) -> pub Field { x * 2 }
    fn triple(x: Field) -> pub Field { x * 3 }
    internal fn quadruple(x: Field) -> pub Field { x * 4 }
    open internal fn skibbidy(x: Field) -> pub Field { x * 5 }
}

run nargo info

[Foo] Total ACIR opcodes generated for language PLONKCSat { width: 3 }: 4
[Foo] Backend circuit size: 7 

[Foo](quadruple) Total ACIR opcodes generated: 1
[Foo](quadruple) Backend circuit size: 2
[Foo](skibbidy) Total ACIR opcodes generated: 1
[Foo](skibbidy) Backend circuit size: 1
[Foo](double) Total ACIR opcodes generated: 1
[Foo](double) Backend circuit size: 2
[Foo](triple) Total ACIR opcodes generated: 1
[Foo](triple) Backend circuit size: 2

[All Contracts] Total ACIR opcodes generated for language PLONKCSat { width: 3 }: 4
[All Contracts] Backend circuit size: 7

Documentation

Documentation issue is already opened

Additional Context

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[TomAFrench]

What's the benefit of printing out the total number of gates summed over all of the functions in your contract and also over all the contracts in your package? This is analogous to printing the amount of gas necessary to call every function in your smart contract once but this doesn't really correspond meaningfully to anything (i.e. certain functions are more gas-sensitive than others, etc.)

We're also planning on restricting packages to containing a single contract anyway in future.

[Ethan-000]

new output after modification

[Foo](double) Total ACIR opcodes generated: 1
[Foo](double) Backend circuit size: 2
[Foo](quadruple) Total ACIR opcodes generated: 1
[Foo](quadruple) Backend circuit size: 2
[Foo](skibbidy) Total ACIR opcodes generated: 1
[Foo](skibbidy) Backend circuit size: 1
[Foo](triple) Total ACIR opcodes generated: 1
[Foo](triple) Backend circuit size: 2