[StreamChatPersistence] Add initial implementation

Signed-off-by: Sahil Kumar <[email protected]>

packages/stream_chat_persistence/lib/src/entity/connection_events.dart

@@ -0,0 +1,19 @@
+import 'package:moor/moor.dart';
+
+@DataClassName('ConnectionEventEntity')
+class ConnectionEvents extends Table {
+  IntColumn get id => integer()();
+
+  TextColumn get ownUserId => text().nullable()();
+
+  IntColumn get totalUnreadCount => integer().nullable()();
+
+  IntColumn get unreadChannels => integer().nullable()();
+
+  DateTimeColumn get lastEventAt => dateTime().nullable()();
+
+  DateTimeColumn get lastSyncAt => dateTime().nullable()();
+
+  @override
+  Set<Column> get primaryKey => {id};
+}