support bang additional triggers

app/lib/features/bangs/data/database/drift/converters/trigger_list.dart

@@ -0,0 +1,20 @@
+import 'dart:convert';
+
+import 'package:drift/drift.dart';
+import 'package:nullability/nullability.dart';
+
+class TriggerListConverter extends TypeConverter<Set<String>?, String?> {
+  const TriggerListConverter();
+
+  @override
+  Set<String>? fromSql(String? fromDb) {
+    return fromDb.mapNotNull(
+      (value) => (jsonDecode(value) as List).cast<String>().toSet(),
+    );
+  }
+
+  @override
+  String? toSql(Set<String>? value) {
+    return value.mapNotNull((value) => jsonEncode(value.toList()));
+  }
+}