fix: Action did not work on Windows runners.

[sokuhatiku]

Changes

Fix action to work on windows-latest

• Replaced symlink to simple javascript.
• Fixed wrong UnityEditor paths.
• Fixed wrong project path at Standalone tests.
• Added nographics option to Editor command line variable.

Added tests to verify that action works on windows-latest

• Specified runs-on bash for replacing script backend process for IL2CPP.

Related Issues

• #200

Successful Workflow Run Link

• https://github.com/sokuhatiku/unity-test-runner/actions/runs/7463004561

Notes

• This PR adds -nographics option to the Unity command line arguments on windows runner. This change affects tests that use graphics features such as RenderTexture for example.
• To see if tests work correctly with windows-latest, this PR increases number of test patterns in main.yml from 49 to 79.

Checklist

• [x] Read the contribution guide and accept the code of conduct
• [ ] Docs (If new inputs or outputs have been added or changes to behavior that should be documented. Please make a PR in the documentation repo)
• [x] Readme (updated or not needed)
• [x] Tests (added, updated or not needed)

[github-actions[bot]]

[webbertakken]

@sokuhatiku Would you mind rebasing and regenerating the dist files? Should be straight forward.

I think it would be great to merge this one.

[sokuhatiku]

@webbertakken I've rebased and regenerated the dist files as requested.