Scope to use attribute rule

[peterfox]

Changes

• creates the new rule and adds it to the Laravel 12 set.
• adds tests
• updates docs

Why

Added in Laravel 12 laravel/framework#54450

 class User extends Model
 {
-    public function scopeActive($query)
+    #[\Illuminate\Database\Eloquent\Attributes\Scope]
+    public function active($query)
     {
         return $query->where('active', 1);
     }
 }