feat(aztec): search for aztec-nargo on top of nargo bin

[kobyhallx]

Partialy resolves

LSP to set nargo path based on nargo or aztec-nargo #4233,

Adds

Status Bar item with information about nargo picked.

Indicates with colour and diagnostic message otherwise

[TomAFrench]

There's some issues related to defaulting to aztec-nargo in all cases. We should ensure that we use vanilla nargo in standard noir projects.

[TomAFrench]

We should also make sure to handle the edge case where the user has a workspace which contains a mix of contracts and other package types. In this case we should use aztec-nargo to ensure we are using a consistent version of nargo across the entire workspace.

[TomAFrench]

Agreed in call that automatic handling of the different versions shouldn't be a requirement for this PR as that would prevent us from moving forwards on this until the next nargo release. Instead we're going to make the status icon clickable to switch between found versions of nargo.