Updating to `numpy` 2.0.0

[davidorme]

Description

This PR sets out the changes needed to move to numpy 2.0.0. Its remarkably clean:

• Need to bump versions of numpy (natch) but also xarray and pint which are now numpy 2.0.0 compatible.
• Add the NPY201 rule for our ruff config.
• A couple of replacements in the code: np.infty to np.inf and np.row_stack to np.vstack

Fixes #453

Type of change

• [ ] New feature (non-breaking change which adds functionality)
• [x] Optimization (back-end change that speeds up the code)
• [ ] Bug fix (non-breaking change which fixes an issue)

Key checklist

• [x] Make sure you've run the pre-commit checks: $ pre-commit run -a
• [x] All tests pass: $ poetry run pytest

Further checks

• [ ] Code is commented, particularly in hard-to-understand areas
• [ ] Tests added that prove fix is effective or that feature works

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.91%. Comparing base (86ba1b8) to head (d2fde90).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #454 +/- ## ======================================== Coverage 94.91% 94.91% ======================================== Files 70 70 Lines 3857 3857 ======================================== Hits 3661 3661 Misses 196 196 ```

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