Implement set-project subcommand

[JAORMX]

Summary

This allows us to easily switch between projects using the ID. Note that
there a further PR will allow us to switch between projects using the
name of an immediate child.

For usability, this adds the minder sp and minder cd aliases (note that set-project is what shows up in the help text).

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• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

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Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[dmjb]

While we have an internal mental model of the project hierarchy working like a directory structure, I wonder if it would be better to use a subcommand that describes what is actually happening - i.e. using set-project instead of cd

[JAORMX]

@dmjb minder sp could work as well. The intention is to have something ergonomic and easy to use, so I thought mimicking the Linux command line could be a way to go. I'm open to creating a set-project with an sp alias though, if you have a strong opinion.

I was planning on implementing an ls command as well.

[dmjb]

@dmjb minder sp could work as well. The intention is to have something ergonomic and easy to use, so I thought mimicking the Linux command line could be a way to go. I'm open to creating a set-project with an sp alias though, if you have a strong opinion.

I was planning on implementing an ls command as well.

If it's possible to allow either sp or set-project, that would be great. If we can only have sp I think that is fine.

ls has a lot of precedent for listing things in CLI utilities (not just directories) so that seems like a good choice. I am just concerned that cd could be a bit unintuitive for new users.

[JAORMX]

@dmjb done