would you mind add more output parameter to AFSA?

Hi Fei, I am now learning to use the scikit-opt now, and I found the output parameter of AFSA is limited. If possible, would you mind adding more output parameters to AFSA such as ga.generation_best_Y and ga.generation_best_X?

Locate the Artificial Fish Swarm Algorithm implementation and inspect how its current output parameters are stored and exposed. Compare it with the existing generation_best_X and generation_best_Y behavior in the genetic algorithm, then add equivalent AFSA outputs and verify them with the relevant tests or examples.

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