Returns an array with the possible statuses a commission can have.
(array) An associative array containing the slugs, as keys, and names, as values, of the statuses that a commission can have.
$statuses = slicewp_get_commission_available_statuses();
// Returned value. Array ( [paid] => Paid [unpaid] => Unpaid [pending] => Pending [rejected] => Rejected )
The returned array can be filtered by applying a callback to the slicewp_commission_available_statuses filter.