Allow Preorder Tile in POS to Add Products (which is in Preorder Offer) to Cart Even if Inventory Requirements Are Not Met

Enable the Stoq Preorder tile in POS to add products from a preorder offer even if they don’t meet the standard inventory conditions (e.g., in-stock products when the offer is set for out-of-stock only). This would let retail staff sell preorder items seamlessly alongside in-stock items