Add a simple Theos tweak with CI build

[devops2626]

     We need an initial Theos tweak project and a CI pipeline to build it automatically on every push.
     
     **Tasks:**
     - Create a basic Objective‑C tweak (e.g., hooks SpringBoard to log a message).
     - Set up a GitHub Actions workflow that builds the tweak on `macos-latest`.
     - Ensure the resulting `.deb` package is uploaded as an artifact.
     
     This will serve as a foundation for future tweak development.
     ```