feat(mac): add a self-contained macOS port under mac/ - #282

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v3, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Non-nullable field 'currentSelected' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'key' in 'List<TranslateAPIConfig> Dictionary<string, List<TranslateAPIConfig>>.this[string key]'.

Possible null reference argument for parameter 'item' in 'void List<TranslateAPIConfig>.Add(TranslateAPIConfig item)'.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.