Benchmark FTCQueue against FastCatQueue

[robrix]

FTCQueue has worst-case constant-time >< & |> + amortized constant time tviewl. type-aligned also offers FastCatQueue with worst-case constant-time ><, |>, <|, and tviewl. We should benchmark them to see how they stack up in practice.

[patrickt]

@robrix I tried implementing this, but ran into type errors that defeated me. I have a sneaking suspicion that FTCQueue will still be faster, as FastCatQueue can be empty, so we'd have to check for the empty case to ensure sanity.