Change load() as a static method for GA

[yoonghm]

By putting load() as a static function for GA, the usage of this nice library could be more concise

from pygad import GA

def fitness_func(solution):
    return fitness_value

ga = GA(
    # ...
)

ga.run()
ga.plot_result()
best_solution, best_solution_fitness = ga.best_solution()
print(f'Best solution:, {best_solution}')
print(f'Fitness value of the best solution: {best_solution_fitness}')
ga.save(filename)

[ahmedfgad]

The load() function is added inside the pygad module outside the GA class which means it is not related at all to the instance.

You just moved the function to be indented behind the GA class and added the @staticmethod decorator to achieve the purpose fulfilled by just placing it outside the GA class.

Either way, the primary goal is achieved.