fix: Refactor camera control interfaces and event arguments

Significantly restructure camera control interfaces and event arguments.
Removed obsolete interfaces like `IHasCameras` and `CameraSelectedEventArgs`,
and introduced generic event argument classes for improved type safety.
Added `IHasCamerasWithControls` for better management of camera controls.
Corrected the `IHasCameraMuteWithUnmuteReqeust` interface name.
Reintroduced the `eCameraControlMode` enum to define camera control modes.
These changes enhance the organization, clarity, and functionality of the camera control system.

src/PepperDash.Essentials.Devices.Common/Cameras/Interfaces/IHasCameraMuteWithUnmuteRequest.cs

@@ -0,0 +1,16 @@
+using System;
+
+
+namespace PepperDash.Essentials.Devices.Common.Cameras
+{
+    /// <summary>
+    /// Interface for devices that can mute and unmute their camera video, with an event for unmute requests
+    /// </summary>
+    public interface IHasCameraMuteWithUnmuteReqeust : IHasCameraMute
+    {
+        /// <summary>
+        /// Event that is raised when a video unmute is requested, typically by the far end
+        /// </summary>
+        event EventHandler VideoUnmuteRequested;
+    }
+}