feat: Add help request functionality to Fusion system controller

Introduce `IFusionHelpRequest` interface for managing help requests, including `HelpRequestResponseFeedback` property and `SendHelpRequest` method. Enhance `EssentialsHuddleSpaceFusionSystemControllerBase` with new properties and methods to support help request tracking and management. Improve code organization and documentation throughout the affected files.

src/PepperDash.Essentials.Core/Fusion/IFusionHelpRequest.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PepperDash.Essentials.Core.Fusion
+{
+    /// <summary>
+    /// Represents Fusion Help Request functionality
+    /// </summary>
+    public interface IFusionHelpRequest
+    {
+        /// <summary>
+        /// Gets the HelpRequstResponseFeedback
+        /// </summary>
+        StringFeedback HelpRequestResponseFeedback { get; }
+
+        /// <summary>
+        /// Sends a help request
+        /// </summary>
+        /// <param name="isHtml"></param>
+        void SendHelpRequest(bool isHtml);
+    }
+}