feat: add Redis identify ratelimiter

Myriad/Gateway/GatewaySettings.cs

@@ -4,6 +4,7 @@ public record GatewaySettings
 {
     public string Token { get; init; }
     public GatewayIntent Intents { get; init; }
+    public bool UseRedisRatelimiter { get; init; } = false;
     public int? MaxShardConcurrency { get; init; }
     public string? GatewayQueueUrl { get; init; }
 }