Enhance in memory ContextEvaluator interface

[wxue-apple]

Hello new to open feature sdk, wondering if a generic type should be part of the Flag parameter as well.

from

/**
 * Context evaluator - use for resolving flag according to evaluation context, for handling targeting.
 *
 * @param <T> expected value type
 */
public interface ContextEvaluator<T> {

    T evaluate(Flag flag, EvaluationContext evaluationContext);
}

to

/**
 * Context evaluator - use for resolving flag according to evaluation context, for handling targeting.
 *
 * @param <T> expected value type
 */
public interface ContextEvaluator<T> {

    T evaluate(Flag<T> flag, EvaluationContext evaluationContext);
}

[aepfli]

I understand your suggestion, but merely to have a type there might not be a good reasoning. hence i am asking, why would we need it, what do you think we can achieve with it. and what topic can we improve with this change?