chore: move classes and interfaces to individual files

src/PepperDash.Essentials.MobileControl/ClientSpecificUpdateRequest.cs

@@ -0,0 +1,20 @@
+using System;
+
+namespace PepperDash.Essentials
+{
+  /// <summary>
+  /// Represents a ClientSpecificUpdateRequest
+  /// </summary>
+  public class ClientSpecificUpdateRequest
+  {
+    public ClientSpecificUpdateRequest(Action<string> action)
+    {
+      ResponseMethod = action;
+    }
+
+    /// <summary>
+    /// Gets or sets the ResponseMethod
+    /// </summary>
+    public Action<string> ResponseMethod { get; private set; }
+  }
+}