ci: update os, python versions, and dependabot configurations

[wang-boyu]

• Include windows and macos in ci builds
• Set python versions to be the same as in Mesa
• Update dependabot to be the same as in Mesa

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (9bc6c58) 80.36% compared to head (9f28f7c) 80.36%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #142   +/-   ##
=======================================
  Coverage   80.36%   80.36%           
=======================================
  Files          10       10           
  Lines         657      657           
  Branches      136      136           
=======================================
  Hits          528      528           
  Misses        114      114           
  Partials       15       15           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[rht]

LGTM