[12.x] Fix Arr::first for ArrayObject and AsArrayObject values

[prince-noman]

This PR fixes a regression where Arr::first() fails when the input is an ArrayObject or an Eloquent cast using AsArrayObject.

Summary

In Laravel 12.39, Arr::first() was updated to use PHP 8.4's new array_find_key() function.
However, array_find_key() only accepts native arrays, not ArrayObject or other array-like values.

This causes a type error when calling Arr::first() on model attributes cast using AsArrayObject, e.g.:

$product = Product::first();

Arr::first($product->prices, fn ($price) => $price === 0);

Error:

array_find_key(): Argument #1 ($array) must be of type array, Illuminate\Database\Eloquent\Casts\ArrayObject given

Fix

This PR normalizes the input using Arr::from() before passing it to array_find_key(), restoring support for:

• ArrayObject
• Illuminate\Database\Eloquent\Casts\ArrayObject (Eloquent AsArrayObject)
• other Traversable / array-like values that worked before the regression

The behavior is fully backward-compatible.

Related Issue

Fixes #57959