Implemented settings, new scan, enhanced UI/UX

lib/model/delivery.dart

@@ -135,7 +135,7 @@ class DeliveryOption {
       if (value.isEmpty) {
         return false;
       } else {
-        return bool.parse(value);
+        return value == "0" ? false : true;
       }
     } else {
       if (value.isEmpty) {
@@ -161,7 +161,7 @@ class DeliveryOption {
   }
 }
 
-class Delivery {
+class Delivery implements Comparable<Delivery> {
   Delivery({
     required this.customer,
     required this.id,
@@ -208,6 +208,11 @@ class Delivery {
   Payment payment;
   List<DeliveryOption> options;
 
+  @override
+  int compareTo(Delivery other) {
+    return customer.name.compareTo(other.customer.name);
+  }
+
   Delivery copyWith({
     Customer? customer,
     String? id,