feat: add "couch mode" for controller input - #542

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. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Replace Path class with IFileSystem.Path for improved testability (http://bit.ly/2ODMkKc)

Dereference of a possibly null reference.