fix: add IMeterFeedback interface

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+  "recommendations": [
+    "ms-dotnettools.vscode-dotnet-runtime",
+    "ms-dotnettools.csharp",
+    "ms-dotnettools.csdevkit",
+    "vivaxy.vscode-conventional-commits",
+    "mhutchie.git-graph"
+  ]
+}

src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IMeterFeedback.cs

@@ -0,0 +1,18 @@
+using System;
+
+namespace PepperDash.Essentials.Core.DeviceTypeInterfaces
+{
+
+  /// <summary>
+  /// Interface for devices that provide audio meter feedback.
+  /// This interface is used to standardize access to meter feedback across different devices.
+  /// </summary>
+  public interface IMeterFeedback
+  {
+    /// <summary>
+    /// Gets the meter feedback for the device.
+    /// This property provides an IntFeedback that represents the current audio level or meter value.
+    /// </summary>
+    IntFeedback MeterFeedback { get; }
+  }
+}