[burt_network] Add time synchronization between dashboard and rover

burt_network/bin/timesync_server.dart

@@ -0,0 +1,6 @@
+import "package:burt_network/src/udp/timesync_server.dart";
+
+void main() async {
+  final timesync = TimesyncServer(port: 8020);
+  await timesync.init();
+}

burt_network/lib/protobuf.dart

@@ -44,7 +44,7 @@ extension MessageUtils on Message {
   WrappedMessage wrap([DateTime? timestamp]) => WrappedMessage(
     data: writeToBuffer(),
     name: messageName,
-    timestamp: Timestamp.fromDateTime(timestamp ?? DateTime.now()),
+    timestamp: Timestamp.fromDateTime(timestamp ?? DateTime.timestamp()),
   );
 }