Optional matplotlib dependency

[axelstudios]

This PR refactors all matplotlib imports to be lazily imported with graceful error-handling to separate core functionality from visualization.

Pygfunction can now be installed with optional matplotlib support:

• pip install pygfunction
• pip install pygfunction[plot]

Attempting to call a function like borefield.visualize_field() without the plot extra will result in the error:

ImportError: Matplotlib is required for plotting. Install it with pip install pygfunction[plot]

It also fixes a small handful of typos, and updates the minimum matplotlib version for compatibility with NumPy 2.0.

[MassimoCimmino]

Thank you @axelstudios.

This looks great. I will open an issue to report the changes in the changelog and go through the files one last time before merging.

This seems like it is completely backwards compatible. We can plan for a v2.3 release shortly after.

Your previous changes had the plotting functionality moved outside of the different modules. It could be a good idea to implement a plotting module. This could allow to have the try / except import of matplotlib in a single place, perhaps in __init__ to effectively make the functionality disappear to the user that does not have matplotlib installed. Anyways, this is something I will consider for v3.0 later on.

Would you mind appearing on the front page of the project in the 'all contributors' list?

[axelstudios]

Would you mind appearing on the front page of the project in the 'all contributors' list?

Not at all, that sounds great 🎉

[MassimoCimmino]

@all-contributors
please add @axelstudios for code.

[allcontributors]

@MassimoCimmino

I've put up a pull request to add @axelstudios! 🎉