[10.x] Add percentage to be used as High Order Messages

[WendellAdriel]

Changes

This PR adds the ability to use the percentage method in the Collections as High Order Messages.

Why

Sometimes when we need to calculate percentages based on some property, instead of doing:

$collection = new $collection([
    ['name' => 'Taylor', 'active' => true],
    ['name' => 'Nuno', 'active' => true],
    ['name' => 'Dries', 'active' => false],
    ['name' => 'Jess', 'active' => true],
]);

$this->assertSame(75.00, $collection->percentage(fn ($value) => $value['active']));

We can simply do:

$collection = new $collection([
    ['name' => 'Taylor', 'active' => true],
    ['name' => 'Nuno', 'active' => true],
    ['name' => 'Dries', 'active' => false],
    ['name' => 'Jess', 'active' => true],
]);

$this->assertSame(75.00, $collection->percentage->active);

It's a simple life improvement that if needed many times can save some time and effort