[8.x] Cast strings into Stringable

[louisgab]

In the same way that dates like created_at casted into Carbon instances are convenient for easy manipulation:

$model->created_at->format('Y-m-d')

instead of

Date::createFromTimestamp($model->created_at)->format('Y-m-d')

I thought it would be cool to cast strings attribute into Stringable instances:

$model->name->title()

instead of

Str::of($model->name)->title()

What do you think about it?

[taylorotwell]

Huge breaking change here. Probably would need to be a new cast like AsStringable::class