feat: Add new messengers for various device interfaces and remove VideoCodecBaseMessenger

- Implemented IHasMeetingInfoMessenger to handle meeting information updates.
- Created IHasReadyMessenger for devices indicating readiness status.
- Added IHasStandbyModeMessenger to manage standby mode actions.
- Introduced IPrivacyMessenger for privacy mode control.
- Developed IVideoCodecInfoMessenger to provide codec information.
- Removed the obsolete VideoCodecBaseMessenger class.
- Updated MessengerFactoryRegistry to register new messengers for IHasReady, IHasMeetingInfo, IHasStartMeeting, IHasStandbyMode, IPrivacy, and IVideoCodecInfo interfaces.

Co-authored-by: Copilot <copilot@github.com>

src/PepperDash.Essentials.Devices.Common/Codec/Interfaces/ICodecCallControls.cs

@@ -0,0 +1,21 @@
+using System.Collections.Generic;
+
+namespace PepperDash.Essentials.Devices.Common.Codec;
+
+/// <summary>
+/// Defines call control functionality for a codec, extending the base dialer interface
+/// with active call list access and meeting dialing.
+/// </summary>
+public interface ICodecCallControls : IHasDialer
+{
+    /// <summary>
+    /// Gets the list of currently active, dialing, or incoming calls
+    /// </summary>
+    List<CodecActiveCallItem> ActiveCalls { get; }
+
+    /// <summary>
+    /// Dials the specified meeting
+    /// </summary>
+    /// <param name="meeting">The meeting to dial</param>
+    void Dial(Meeting meeting);
+}

src/PepperDash.Essentials.Devices.Common/Codec/iHasDialer.cs

@@ -53,5 +53,7 @@ public interface IHasDialer
     /// Gets a value indicating whether the device is currently in a call
     /// </summary>
     bool IsInCall { get; }
+
+    
 }