feat: make permission denied messages optional and configurable

src/SampSharp.OpenMp.Entities.Commands/Options/PlayerCommandServiceOptions.cs

@@ -10,4 +10,19 @@ public class PlayerCommandServiceOptions : CommandServiceOptions
     /// Defaults to <see cref="Color.White"/>.
     /// </summary>
     public Color UsageMessageColor { get; set; } = Color.White;
+
+    /// <summary>
+    /// Gets or sets the color used when displaying permission denied messages.
+    /// Defaults to <see cref="Color.White"/>.
+    /// </summary>
+    public Color PermissionDeniedMessageColor { get; set; } = Color.White;
+
+    /// <summary>
+    /// Gets or sets the message displayed when a player attempts to execute
+    /// a command without sufficient permissions.
+    /// If <see langword="null"/>, no message is sent.
+    /// Defaults to "You do not have permission to use this command.".
+    /// </summary>
+    public string? PermissionDeniedMessage { get; set; }
+        = "You do not have permission to use this command.";
 }

src/SampSharp.OpenMp.Entities.Commands/Player/DefaultPlayerCommandMessageService.cs

@@ -94,8 +94,10 @@ public virtual bool SendPermissionDenied(Player player, CommandDefinition overlo
         ArgumentNullException.ThrowIfNull(player);
         ArgumentNullException.ThrowIfNull(overload);
 
-        const string message = "You do not have permission to use this command.";
-        player.SendClientMessage(message);
+        if (_options.PermissionDeniedMessage is null)
+            return true;
+
+        player.SendClientMessage(_options.PermissionDeniedMessageColor, _options.PermissionDeniedMessage);
         return true;
     }