refactor: Refactor DeviceManager and related classes to improve thread safety and performance

- Replaced CCriticalSection with lock statements in DeviceManager for better thread management.
- Updated AddDevice and RemoveDevice methods to use Monitor for locking.
- Enhanced event handling for device activation and registration.
- Modified FileIO class to utilize Task for asynchronous file operations instead of CrestronInvoke.
- Improved feedback mechanisms in FeedbackBase and SystemMonitorController using Task.Run.
- Refactored GenericQueue to remove Crestron threading dependencies and utilize System.Threading.
- Updated BlueJeansPc and VideoCodecBase classes to use Task for asynchronous operations.
- Cleaned up unnecessary critical sections and improved code documentation across various files.

src/PepperDash.Essentials.Core/Feedbacks/FeedbackBase.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using Crestron.SimplSharp;
 using PepperDash.Core;
 
@@ -77,11 +78,11 @@ namespace PepperDash.Essentials.Core
         public abstract void FireUpdate();
 
         /// <summary>
-        /// Fires the update asynchronously within a CrestronInvoke
+        /// Fires the update asynchronously within a Task
         /// </summary>
         public void InvokeFireUpdate()
         {
-            CrestronInvoke.BeginInvoke(o => FireUpdate());
+            Task.Run(() => FireUpdate());
         }
 
         /// <summary>