chore: windows dev and ci.

[knightedcodemonkey]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.43%. Comparing base (e8e7f69) to head (6c06092).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #56   +/-   ##
=======================================
  Coverage   89.43%   89.43%           
=======================================
  Files          15       15           
  Lines        1467     1467           
  Branches      394      394           
=======================================
  Hits         1312     1312           
  Misses         39       39           
  Partials      116      116           

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[Copilot]

Pull request overview

This PR adds Windows support for development and continuous integration by updating scripts, tests, and CI configuration to handle Windows-specific behaviors. The main changes include handling undefined environment variables, using appropriate shell options for Windows, and adding cross-platform environment variable support.

• Updates test and script files to properly handle Windows platform-specific requirements
• Adds cross-env package for cross-platform environment variable handling
• Expands CI matrix to include Windows builds alongside Ubuntu

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/next-fixture.test.ts	Added Windows support by filtering undefined env variables and enabling shell mode for Windows in spawn calls
scripts/setup-wasm.mjs	Enhanced npm pack execution with Windows compatibility (shell option and .cmd support), updated WASM binding version, and removed unused CLI entry logic
package.json	Added cross-env dependency and updated test scripts to use cross-env for cross-platform environment variable support
package-lock.json	Added cross-env and its dependency @epic-web/invariant to the lock file
.github/workflows/ci.yml	Expanded CI matrix to test on both Ubuntu and Windows with explicit Node versions (22.17.0, 24.11.1)

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