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

[fabiovincenzi]

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]

✅ Deploy Preview for endearing-brigadeiros-63f9d0 canceled.

Name	Link
🔨 Latest commit	4343773
🔍 Latest deploy log	https://app.netlify.com/projects/endearing-brigadeiros-63f9d0/deploys/6973a4f6c9462e0007c60910

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.40%. Comparing base (09b226b) to head (4343773).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1361   +/-   ##
=======================================
  Coverage   80.40%   80.40%           
=======================================
  Files          65       65           
  Lines        4608     4608           
  Branches      775      775           
=======================================
  Hits         3705     3705           
  Misses        888      888           
  Partials       15       15           

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