fix(Basket): improve basket id handling and user check in Basket.php

See merge request !138

Improve readability and interpretability of code by explicitly stating null in union types. This
change has been applied across multiple files and functions.

PHP8.4 compatibility

Added a conditional check in src/QUI/ERP/Order/Basket/Basket.php to convert basketId to actual id
from user's session if it is a boolean value. This fixes potential issues that may arise with
non-integer basketIds.

Also, introduced a safeguard check before saving to ensure there is a valid User. If not, the save
function is exited early to prevent potential errors or undesired actions.

fix: update default paymentId status

See merge request !137

Changed the default value of paymentId status in the paymentChangeable list from 1 to 0 to ensure
accurate payment status representation.

Related: #176

fix: tracking + text article

See merge request !135

fix: back to backet locale

See merge request !134

Next 2.x

See merge request !133

fix(Order): added missing user interface types for save methods

See merge request !132

Next 2.x

See merge request !131

fix(Order): get parameters get lost

See merge request !130

Related: #174

fix: undefined constant QUI\ERP\Order\Basket\unformatted

See merge request !129

fix(Basket): import() - $products must be of type array, null given

See merge request !128

fix: basket calc also sends unformatted values

See merge request !127

fix: uncaught error: Typed property Basket::$id must not be accessed before initialization

See merge request !126

fix: optimize order process for nobody user on mobile devices

See merge request !124

Related: order-guestorder#6

Related: order-guestorder#6

fix(Handler): no internal instance cache

See merge request !123