Related issue(s)

Baby step towards #794

Description

Summary of changes

Currently nargo cannot run except in the root directory of a noir package. This is a little annoying if you're in the src directory of a package but nargo isn't smart enough to compile the program inside it.

When running the nargo CLI we now search all ancestor directories for a Nargo.toml file and then run in the context of that directory.

Dependency additions / changes

Test additions / changes

Checklist

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt with default settings.
• I have linked this PR to the issue(s) that it resolves.
• I have reviewed the changes on GitHub, line by line.
• I have ensured all changes are covered in the description.

Documentation needs

• This PR requires documentation updates when merged.

Additional context