feat: ICurrentSources interface to allow for tracking breakaway routing

src/PepperDash.Essentials.Core/Routing/ICurrentSources.cs

@@ -0,0 +1,28 @@
+using System.Collections.Generic;
+
+namespace PepperDash.Essentials.Core.Routing
+{
+  /// <summary>
+  /// The current sources for the room, keyed by eRoutingSignalType.
+  /// This allows for multiple sources to be tracked, such as audio and video.
+  /// </summary>
+  /// <remarks>
+  /// This interface is used to provide access to the current sources in a room,
+  /// allowing for more complex routing scenarios where multiple signal types are involved.
+  /// </remarks>
+  public interface ICurrentSources
+  {
+    /// <summary>
+    /// Gets the current sources for the room, keyed by eRoutingSignalType.
+    /// This dictionary contains the current source for each signal type, such as audio, video,
+    /// </summary>
+    Dictionary<eRoutingSignalType, SourceListItem> CurrentSources { get; }
+
+    /// <summary>
+    /// Gets the current source keys for the room, keyed by eRoutingSignalType.
+    /// This dictionary contains the keys for the current source for each signal type, such as audio,
+    /// </summary>
+    Dictionary<eRoutingSignalType, string> CurrentSourceKeys { get; }
+
+  }
+}