Add windows support

[steven-murray]

Description

This adds psutil to the dependencies for the [sim] extra, and moves the import of resource / psutil into the only function that uses it. This means that Windows can now run sims.

Note that some tests still fail on windows (e.g. using miriad files). I haven't dug deep into it, but we could try putting xfails on thins we know will fail and start testing against windows if we want. For now, this update means all matvis tests pass on windows.

Motivation and Context

In testing matvis against pyuvsim, I was trying to use the GPU, and on my laptop that's easier to do on Windows. I found that the pyuvsim comparison tests broke on Windows however, simply because of the import of resource, which is unix-only. This fixes it.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Reference simulation update or replacement
• Documentation change (documentation changes only)
• Version change
• Build or continuous integration change

Checklist:

For all pull requests:

• I have read the contribution guide.
• My code follows the code style of this project.

Build or continuous integration change checklist:

• If required or optional dependencies have changed (including version numbers), I have updated the readme to reflect this.
• If this is a new CI setup, I have added the associated badge to the readme and to references/make_index.py (if appropriate).

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.

Project coverage is 99.80%. Comparing base (6ea6af1) to head (60703a6).

Files with missing lines	Patch %	Lines
src/pyuvsim/mpi.py	66.66%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main     #511      +/-   ##
===========================================
- Coverage   100.00%   99.80%   -0.20%     
===========================================
  Files           10       10              
  Lines         2024     2031       +7     
===========================================
+ Hits          2024     2027       +3     
- Misses           0        4       +4     

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[bhazelton]

This is great! The myriad part of pyuvdata doesn't work on Windows, so that's why those break.

[bhazelton]

Oh, casacore is also not available on Windows, so the measurement set writing should also be skipped on Windows.

[bhazelton]

I suspect we should update the readme and maybe some other docs to mention windows compatibility.