Add /shuffle command

Signed-off-by: mctaylors <cantsendmails@mctaylors.ru>

Cassette/Commands/ControlsCommandGroup.cs

@@ -165,6 +165,27 @@ public sealed class ControlsCommandGroup(
             feedbackService.Theme.Success);
     }
 
+    [Command("shuffle")]
+    [Description("Changes player repeat mode")]
+    [DiscordDefaultDMPermission(false)]
+    [UsedImplicitly]
+    public async Task<Result> ShuffleCommandAsync(
+        [Description("Enable shuffle mode")] bool enable)
+    {
+        var player = await LavalinkPlayer.GetPlayerAsync(
+            commandContext, audioService, feedbackService);
+        if (player is null)
+        {
+            return Result.FromSuccess();
+        }
+
+        player.Shuffle = enable;
+
+        return await feedbackService.SendContextualMessageResult(
+            $"Shuffle mode is now {Markdown.Bold(enable ? "enabled" : "disabled")}",
+            feedbackService.Theme.Success);
+    }
+
     [Command("seek")]
     [Description("Rewinds the current track to a specific position")]
     [DiscordDefaultDMPermission(false)]

Cassette/Commands/InfoCommandGroup.cs

@@ -84,15 +84,20 @@ public sealed class InfoCommandGroup(
         var repeatMode = player.RepeatMode;
         if (repeatMode is not TrackRepeatMode.None)
         {
-            builder.AppendLine($"> The current repeat mode is set to {Markdown.Bold(repeatMode.ToString())}");
+            builder.AppendLine($"> Repeat mode was set to {Markdown.Bold(repeatMode.ToString())}");
         }
 
         if (repeatMode is TrackRepeatMode.Track)
         {
-            builder.AppendLine("Use **/nowplaying** to show current playing track");
+            builder.AppendLine($"Use {Markdown.Bold("/nowplaying")} to show current playing track");
             return Result.FromSuccess();
         }
 
+        if (player.Shuffle)
+        {
+            builder.AppendLine($"> Shuffle mode was {Markdown.Bold("enabled")}");
+        }
+
         for (var i = 0; i < queue.Count; i++)
         {
             var track = queue[i].Track;