ci: add Windows to test matrix and fix cross-platform compatibility

[fabiovincenzi]

Fixes: #1318.
This PR adds Windows to the CI test matrix and fixes cross-platform compatibility issues.

CI Changes

• Add windows-latest to the OS matrix
• Enable Windows Developer Mode in CI for npm symlinks support
• Skip Cypress e2e tests on Windows
• Remove unnecessary MongoDB dependency and version matrix (see below)

Cross-Platform Fixes

• Replace bash script fix-shebang.sh with Node.js fix-shebang.js
• Add cross-env package for Windows-compatible environment variables in npm scripts

The preReceive tests are skipped because they test Unix shell hook execution, which is not applicable on Windows.

[netlify]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.26%. Comparing base (2150064) to head (65c45bd).

Files with missing lines	Patch %	Lines
src/proxy/processors/push-action/preReceive.ts	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1361      +/-   ##
==========================================
- Coverage   81.35%   81.26%   -0.09%     
==========================================
  Files          65       65              
  Lines        4639     4644       +5     
  Branches      792      793       +1     
==========================================
  Hits         3774     3774              
- Misses        850      855       +5     
  Partials       15       15              

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[jescalada]

The tests look good!

Wondering if we could keep the MongoDB combinations in the CI and think about whether we need a Windows CI execution since Windows test support is more of a quality-of-life thing for Windows development...

[fabiovincenzi]

Thanks for the review @jescalada!
It should be ready for another look.😃

[jescalada]

LGTM! 👍🏼