Feature/add auto pagination helper methods

[Naoray]

This is a follow up PR of #701 to add helper methods to the auto pagination functionality. Similar to the advanced usage of the nodejs implementation.

In general this PR allows to chain methods onto the getAutoPaginator() method call in order to manipulate items within the collection. The available methods are

• all() -> returns the current page items as array
• get() -> enables to receive a specific item from the collection
• filter() -> filters through all entries and generates a new collection from the filtered result
• first() -> returns first item of the collection passing the given truth test
• map() -> returns the mapped collection for the given callback
• take() -> returns a new collection with only X items
• every() -> determines if all items of the collection pass a given truth test
• count() -> receive the count of the current collection items

This new approach allows for the following usages

$iterator = $client->payments
    ->iterator()
    ->filter(fn (Payment $payment) => $payment->amount->currency === ‘EUR’ && $payment->amount->value > 100)
    ->take(10);

foreach ($iterator as $payment) {
    //…
}