update bookable space logic

lib/pages/access_management/manage_bookable_spaces/domain/models/bookable_space_config.dart

@@ -40,7 +40,24 @@ class BookableSpaceConfig {
 
   bool get isValid =>
       bookableDays.isNotEmpty &&
-      cost > 0 &&
+      cost >= 0 &&
       bookingStartTime != null &&
       bookingEndTime != null;
+
+  BookableSpaceConfig copyWith({
+    List<String>? bookableDays,
+    TimeOfDay? bookingStartTime,
+    TimeOfDay? bookingEndTime,
+    int? cost,
+    bool? availability,
+  }) {
+    return BookableSpaceConfig(
+      configUuid: configUuid,
+      availability: availability ?? this.availability,
+      bookableDays: bookableDays ?? this.bookableDays,
+      cost: cost ?? this.cost,
+      bookingEndTime: bookingEndTime ?? this.bookingEndTime,
+      bookingStartTime: bookingStartTime ?? this.bookingStartTime,
+    );
+  }
 }

lib/pages/access_management/manage_bookable_spaces/domain/models/bookable_space_model.dart

@@ -41,4 +41,18 @@ class BookableSpacemodel {
       spaceVirtualAddress.isNotEmpty &&
       spaceConfig != null &&
       spaceConfig!.isValid;
+
+  BookableSpacemodel copyWith({
+    String? spaceUuid,
+    String? spaceName,
+    BookableSpaceConfig? spaceConfig,
+    String? spaceVirtualAddress,
+  }) {
+    return BookableSpacemodel(
+      spaceUuid: spaceUuid ?? this.spaceUuid,
+      spaceName: spaceName ?? this.spaceName,
+      spaceConfig: spaceConfig ?? this.spaceConfig,
+      spaceVirtualAddress: spaceVirtualAddress ?? this.spaceVirtualAddress,
+    );
+  }
 }