Enum value printing

[Simn]

Enum values are currently not printed properly. This is related to #6 and we should make sure to generate the necessary information in a way that doesn't waste memory unnecessarily.

[Simn]

This works now. It's a bit stupid because we construct arrays when printing, but we can fix that later.

[Simn]

This is the current implementation of Enum.toString:

    public function toString() {
        var baseName = Type.getEnumConstructs(Type.getEnum(cast this))[_hx_index];
        var parameters = Type.enumParameters(cast this);
        if (parameters.length == 0) {
            return baseName;
        }
        return '$baseName(${@:privateAccess parameters.join(", ")})';
    }

This is obviously not efficient because Type.enumParameters does dynamic lookup on the enum fields. The alternative would be to have a custom toString on every enum constructor class, but there can be lots of those and I'm worried about spamming the method storage area.

[Simn]

I'll go ahead and "this is fine" here because I don't care much about printing performance. If this proves to be an issue in some situation we can always improve on it later.