Restructure documentation layout

docs/guides/voice/samples/joining_audio.cs

@@ -0,0 +1,10 @@
+[Command("join")]
+public async Task JoinChannel(IVoiceChannel channel = null)
+{
+    // Get the audio channel
+    channel = channel ?? (msg.Author as IGuildUser)?.VoiceChannel;
+    if (channel == null) { await msg.Channel.SendMessageAsync("User must be in a voice channel, or a voice channel must be passed as an argument."); return; }
+
+    // For the next step with transmitting audio, you would want to pass this Audio Client in to a service.
+    var audioClient = await channel.ConnectAsync();
+}