WarningIn-Development feature. Unstable.
ValueAttribute & KeyAttribute (for dictionary key only) allows to down-pass an attribute into the nested target for
combo data types provided by SaintsField, e.g SaintsDictionary<>, SaintsArray
Even though SaintsArray is used to mimic the behavior of a nested array, it still requires downpour to inject into target
fields.
For example
[ValueAttribute(typeof(ExpandableAttribute))] public SaintsArray<Scriptable[]> arrayInsideSaints;
// TODO: complete this doc when the function is ready