feat: Add IEssentialsRoomFusionController and related configurations

- Introduced IEssentialsRoomFusionControllerFactory for creating Fusion Room Controller devices.
- Added IEssentialsRoomFusionControllerPropertiesConfig to define configuration properties for the Fusion Room Controller.
- Updated IFusionHelpRequest interface to include methods for cancelling and toggling help requests.
- Refactored RoomOnToDefaultSourceWhenOccupied to use IEssentialsRoomFusionController instead of EssentialsHuddleSpaceFusionSystemControllerBase.
- Modified EssentialsRoomBase to check for IEssentialsRoomFusionController in occupancy status provider.

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

@@ -0,0 +1,25 @@
+using Newtonsoft.Json;
+
+/// <summary>
+/// Config properties for an IEssentialsRoomFusionController device
+/// </summary>
+public class IEssentialsRoomFusionControllerPropertiesConfig
+{
+    /// <summary>
+    /// Gets or sets the IP ID of the Fusion Room Controller
+    /// </summary>
+    [JsonProperty("ipId")]
+    public uint IpId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the join map key
+    /// </summary>
+    [JsonProperty("joinMapKey")]
+    public string JoinMapKey { get; set; }
+
+    /// <summary>
+    /// Gets or sets the room key associated with this Fusion Room Controller
+    /// </summary>
+    [JsonProperty("roomKey")]
+    public string RoomKey { get; set; }
+}