Add JetStream support

[drasticactions]

This PR supports JetStream using the new ATJetStream class.

For example:

var atWebProtocolBuilder = new ATJetStreamBuilder()
    .WithLogger(debugLog.CreateLogger("FishyFlipDebug"));
var atWebProtocol = atWebProtocolBuilder.Build();

atWebProtocol.OnConnectionUpdated += (sender, e) =>
{
    Console.WriteLine($"Connection Status: {e.State}");
};

atWebProtocol.OnRawMessageReceived += (sender, e) =>
{
    Console.WriteLine($"Raw Message: {e.MessageJson}");
};

atWebProtocol.OnRecordReceived += (sender, e) =>
{
    Console.WriteLine($"Record Received: {e.Record}");
};

await atWebProtocol.ConnectAsync();

var key = Console.ReadKey();

await atWebProtocol.CloseAsync();