feat: wrap ExecuteClientCommand and add sound example

managed/CounterStrikeSharp.API/Core/Model/CCSPlayerController.cs

@@ -144,4 +144,10 @@ public partial class CCSPlayerController
     /// Gets the active pawns button state. Will work even if the player is dead or observing.
     /// </summary>
     public PlayerButtons Buttons => (PlayerButtons)Pawn.Value.MovementServices!.Buttons.ButtonStates[0];
+
+    public void ExecuteClientCommand(string command)
+    {
+        var entityIndex = this.EntityIndex;
+        if (entityIndex != null) NativeAPI.IssueClientCommand((int)entityIndex.Value.Value - 1, command);
+    }
 }

managed/TestPlugin/TestPlugin.cs

@@ -481,6 +481,15 @@ namespace TestPlugin
                 command.ReplyToCommand($" {(char)i}Color 0x{i:x}");
             }
         }
+        
+        [ConsoleCommand("css_sound", "Play a sound to client")]
+        public void OnCommandSound(CCSPlayerController? player, CommandInfo command)
+        {
+            if (player == null) return;
+            if (!player.PlayerPawn.IsValid) return;
+
+            player.ExecuteClientCommand($"play sounds/ui/counter_beep.vsnd");
+        }
 
         [ConsoleCommand("css_pause", "Pause Game")]
         public void OnCommandPause(CCSPlayerController? player, CommandInfo command)