Add ArrangeBy option

[Tigrov]

Similar to IndexBy, this option will arrange records by a value.

For example

$userQuery = new ActiveQuery(User::class, $db);

$users = $userQuery->arrangeBy('status')->all();

The result is

[
    'active' => [
        0 => User,
        1 => User,
        2 => User,
    ],
    'inactive' => [
        0 => User,
        1 => User,        
    ],
];

[vjik]

It's also will be userfull in Query from Yii DB.