Add new custom EnumCollection class

[hailwood]

Right now there are a few things that are less than optimal when working with a collection of Enums.

E.g. removing an enum from the collection looks something like -

$myEnumCollection = $myEnumCollection->filter(fn(Actions $action) => $action->isNot(Action::CREATE));

We should create our own collection class and override some methods so we can do things like

$myEnumCollection->forget(Action::CREATE);