chore: begin porting code from playground

src/StevesBot.Worker/Discord/DiscordClientException.cs

@@ -0,0 +1,16 @@
+namespace StevesBot.Worker.Discord;
+
+internal class DiscordClientException : Exception
+{
+  public DiscordClientException()
+  {
+  }
+
+  public DiscordClientException(string message) : base(message)
+  {
+  }
+
+  public DiscordClientException(string message, Exception innerException) : base(message, innerException)
+  {
+  }
+}