Add ARM and Windows vanilla Python to CI runs

[mdekstrand]

This adds ARM runners and Windows vanilla Python to the CI runs, to test on these platforms.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.04%. Comparing base (48a4fec) to head (08d138c).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
lenskit/lenskit/logging/monitor.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #609   +/-   ##
=======================================
  Coverage   90.04%   90.04%           
=======================================
  Files         108      108           
  Lines        6814     6814           
=======================================
  Hits         6136     6136           
  Misses        678      678           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.