Switch project to using uv rather than poetry

[DocOtak]

Converts project to using uv for every part of its lifecycle.

Some notable changes:

• Sets minimum dependencies in pyproject.toml using python version markers (@rcaneill please pay special attention to this when reviewing)
• Uses above minimum dependencies in CI
• Switches to trusted publishing to pypi (I've already configured pypi to be ready)
• Switches the readthedoc builder to uv
• I relaxed the xarray dependency to be what is recommended in spec0 though maybe it's 2023.10 now.

Closes #78

[rcaneill]

For python 3.10 and 3.11:

The version lowest-direct fails because gsw seems to be compiled for numpy 1.x, while the projects uses numpy 2.x (with a version lowest I guess that it would catch numpy 1.x, but it would also catch all outdated packages coming from other packages that did not set proper version constraints)

For python 3.12 and 3.13:

E AttributeError: module 'numpy' has no attribute 'cumproduct'. Did you mean: 'cumprod'?

This error comes from pint

[DocOtak]

What should we do?

If we follow SPEC0, we should drop numpy<2 support, and python 3.10 support. Recent versions of xarray already have a python >=3.11 requirement, but hasn't yet dropped numpy 1. GSW tests against numpy2 starting with v3.6.18.

When I did my initial testing, indeed found that the "lowest" strategy was a bit of a mess.

[rcaneill]

I agree the lowest is a mess ^^, but that’s why it should be tested I guess

I believe that we can drop 3.10 support, and require gsw>=3.6.18. As our new version does not bring any extra feature, this will not block any user that still uses python 3.10 and old gsw version

[rcaneill]

For the pint error, version 0.24.1 seems to be compatible with numpy 2 and 1
hgrecco/pint#1974

[rcaneill]

What I propose is:

• Pint>=0.24.1
• pint-xarray>=0.6

[DocOtak]

Sounds good, feel free to push updates to this pr.

[rcaneill]

We need pint>0.24.4
hgrecco/pint#2074

superseded by new commits

[rcaneill]

I added ci for python 3.14 as it is gonna be released soon, so it is done :)

[rcaneill]

@DocOtak can you review and merge if you’re happy with the modifications?