This commit expands the Haskell test suite to cover the advanced mux implementations by importing CpuArrow.Advanced.Mux and wiring new Mux and Mux2 groups into the main test tree. The new cases exhaustively exercise selector combinations and input permutations, which helps confirm the circuit semantics beyond the existing basic logic-gate coverage. In practice, this gives much better confidence that multiplexing primitives behave correctly as the library grows.