docs: add XML comments for messengers

src/PepperDash.Essentials.MobileControl.Messengers/Messengers/GenericMessenger.cs

@@ -2,12 +2,22 @@
 
 namespace PepperDash.Essentials.AppServer.Messengers
 {
+    /// <summary>
+    /// Generic messenger for basic device communication
+    /// </summary>
     public class GenericMessenger : MessengerBase
     {
+        /// <summary>
+        /// Initializes a new instance of the GenericMessenger class
+        /// </summary>
+        /// <param name="key">Unique identifier for the messenger</param>
+        /// <param name="device">Device to communicate with</param>
+        /// <param name="messagePath">Path for message routing</param>
         public GenericMessenger(string key, EssentialsDevice device, string messagePath) : base(key, messagePath, device)
         {
         }
 
+        /// <inheritdoc />
         protected override void RegisterActions()
         {
             base.RegisterActions();