Prepare new validation tags utilizing type.

[samchon]

I'm planning to add another way of validation tags utilizing special optional type like below. To support this feature, Metadata must have a break change, and it is the reason why preparing this feature's interface in v5 update, even though this features has not been completed yet.

export type Maximum<Fixed extends number | bigint> = {
    "typia.tag"?: {
        target: Fixed extends number ? "number" : "bigint";
        kind: "maximum";
        value: Fixed;
        validate: `$input <= ${Fixed}`;
    };
};