feat: Add camera control interfaces and messenger classes

This commit introduces new interfaces in `CameraControl.cs` for various camera functionalities, including muting, panning, tilting, zooming, and auto modes. The `IHasCameras` interface is expanded to manage camera lists and selections, with the addition of `CameraSelectedEventArgs` for event handling.

In `CameraBaseMessenger.cs`, a new `IHasCamerasMessenger` class is created to facilitate communication for devices implementing the `IHasCameras` interface, along with the `IHasCamerasStateMessage` class to represent the state of camera devices. These changes enhance the overall camera control capabilities and improve interaction management within the application.

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

@@ -6,11 +6,14 @@ using System.Collections.Generic;
 
 namespace PepperDash.Essentials.AppServer.Messengers
 {
+    /// <summary>
+    /// Messenger for a CameraBase device
+    /// </summary>
     public class CameraBaseMessenger : MessengerBase
     {
         /// <summary>
         /// Device being bridged
-        /// </summary>
+        /// </summary>  
         public CameraBase Camera { get; set; }
 
         /// <summary>
@@ -45,6 +48,9 @@ namespace PepperDash.Essentials.AppServer.Messengers
             );
         }
 
+        /// <summary>
+        /// Registers the actions for this messenger.  This is called by the base class
+        /// </summary>
         protected override void RegisterActions()
         {
             base.RegisterActions();