Rename solution & project, move the project files one layer up

Commands/PingCommand.cs

@@ -0,0 +1,18 @@
+namespace Boyfriend.Commands;
+
+public sealed class PingCommand : ICommand {
+    public string[] Aliases { get; } = { "ping", "latency", "pong", "пинг", "задержка", "понг" };
+
+    public Task RunAsync(CommandProcessor cmd, string[] args, string[] cleanArgs) {
+        var builder = Boyfriend.StringBuilder;
+
+        builder.Append(Utils.GetBeep())
+            .Append(Math.Round(Math.Abs(DateTimeOffset.Now.Subtract(cmd.Context.Message.Timestamp).TotalMilliseconds)))
+            .Append(Messages.Milliseconds);
+
+        cmd.Reply(builder.ToString(), ReplyEmojis.Ping);
+        builder.Clear();
+
+        return Task.CompletedTask;
+    }
+}