docs: add missing XML comments for Mobile Control Project

src/PepperDash.Essentials.MobileControl/Touchpanel/ThemeMessenger.cs

@@ -7,17 +7,24 @@ using PepperDash.Essentials.AppServer.Messengers;
 namespace PepperDash.Essentials.Touchpanel
 {
     /// <summary>
-    /// Represents a ThemeMessenger
+    /// Messenger to save the current theme (light/dark) and send to a device
     /// </summary>
     public class ThemeMessenger : MessengerBase
     {
         private readonly ITheme _tpDevice;
 
+        /// <summary>
+        /// Create an instance of the <see cref="ThemeMessenger"/> class
+        /// </summary>
+        /// <param name="key">The key for this messenger</param>
+        /// <param name="path">The path for this messenger</param>
+        /// <param name="device">The device for this messenger</param>
         public ThemeMessenger(string key, string path, ITheme device) : base(key, path, device as Device)
         {
             _tpDevice = device;
         }
 
+        /// <inheritdoc />
         protected override void RegisterActions()
         {
             AddAction("/fullStatus", (id, content) =>