feat: add filter to clean non allowed fee plans (#233)

Author: webaaz

src/Plugin/Infrastructure/Adapter/FeePlanListAdapterInterface.php

@@ -43,4 +43,11 @@ public function filterFeePlanList(array $paymentMethod): FeePlanListAdapterInter
      * @return FeePlanListAdapterInterface
      */
     public function filterEnabled(): FeePlanListAdapterInterface;
+
+    /**
+     * Returns a FeePlanList containing only available FeePlans (allowed by Alma).
+     *
+     * @return FeePlanListAdapterInterface
+     */
+    public function filterAvailable(): FeePlanListAdapterInterface;
 }