TF-1363: [Domain] [Domain] Store, Get, Delete spamReportState in UseCase

lib/features/mailbox_dashboard/domain/model/spam_report_state.dart

@@ -0,0 +1,16 @@
+enum SpamReportState {
+  enabled,
+  disabled,
+}
+
+extension SpamReportStateExtension on SpamReportState {
+
+  String get keyValue {
+    switch(this) {
+      case SpamReportState.enabled:
+        return 'enabled';
+      case SpamReportState.disabled:
+        return 'disabled';
+    }
+  }
+}