Fix hwengine crash when using >1 controllers
Reason: Data type mismatch for SDL_JoystickName, we wed in an index, but it expected a controller handle.
Solution: Switch to SDL_JoystickNameForIndex.
Directory for automated tests to test the engine.
Run `ctest` in the root directory of this repository to run all tests.
Run `ctest -R <test name>` to run only the test with the given name.
This requires you to have CMake.