[12.x] Add a default option when retrieving an enum from data

[elbojoloco]

Enables you to provide a default value when retrieving an enum from data which is consistent with other getters in the InteractsWithData trait An example use case is when you're handling GET params in a dashboard.

Old:

$chartType = request()->enum('chart_type', ChartTypeEnum::class) ?: ChartTypeEnum::Bar;

New:

$chartType = request()->enum('chart_type', ChartTypeEnum::class, ChartTypeEnum::Bar);

[shaedrich]

Would be cool to have an attribute on the enum or a method or the like 🤔