Remove rubber duck from BRW, RW and most weapon schemes for now The duck is not liked by players. Rubber duck needs a lot of rework. Before that happens, better remove it from game modes for now. Players can always modify the weapon schemes, of course.

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.