feat: move MC into Essentials

In order to solve some dependency issues that keep cropping up, MC
should be moved back into the Essentials repo and loaded automatically
on startup. This will allow for all plugins that use the MC Messengers
library to use the same version without fear of overwriting a dll due to
loading of plugin libraries.

src/PepperDash.Essentials.MobileControl.Messengers/Messengers/IRunRouteActionMessenger.cs

@@ -0,0 +1,89 @@
+using Newtonsoft.Json;
+using PepperDash.Core;
+using PepperDash.Essentials.Core;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
+using System;
+
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    public class RunRouteActionMessenger : MessengerBase
+    {
+        /// <summary>
+        /// Device being bridged
+        /// </summary>
+        public IRunRouteAction RoutingDevice { get; private set; }
+
+        public RunRouteActionMessenger(string key, IRunRouteAction routingDevice, string messagePath)
+            : base(key, messagePath, routingDevice as Device)
+        {
+            RoutingDevice = routingDevice ?? throw new ArgumentNullException("routingDevice");
+
+
+            if (RoutingDevice is IRoutingSink routingSink)
+            {
+                routingSink.CurrentSourceChange += RoutingSink_CurrentSourceChange;
+            }
+        }
+
+        private void RoutingSink_CurrentSourceChange(SourceListItem info, ChangeType type)
+        {
+            SendRoutingFullMessageObject();
+        }
+
+#if SERIES4
+        protected override void RegisterActions()
+#else
+        protected override void CustomRegisterWithAppServer(MobileControlSystemController appServerController)
+#endif
+        {
+            AddAction("/fullStatus", (id, content) => SendRoutingFullMessageObject());
+
+            AddAction("/source", (id, content) =>
+                {
+                    var c = content.ToObject<SourceSelectMessageContent>();
+                    // assume no sourceListKey
+                    var sourceListKey = string.Empty;
+
+                    if (!string.IsNullOrEmpty(c.SourceListKey))
+                    {
+                        // Check for source list in content of message
+                        Debug.Console(1, this, "sourceListKey found in message");
+                        sourceListKey = c.SourceListKey;
+                    }
+
+                    RoutingDevice.RunRouteAction(c.SourceListItemKey, sourceListKey);
+                });
+
+            if (RoutingDevice is IRoutingSink sinkDevice)
+            {
+                sinkDevice.CurrentSourceChange += (o, a) => SendRoutingFullMessageObject();
+            }
+        }
+
+        /// <summary>
+        /// Helper method to update full status of the routing device
+        /// </summary>
+        private void SendRoutingFullMessageObject()
+        {
+            if (RoutingDevice is IRoutingSink sinkDevice)
+            {
+                var sourceKey = sinkDevice.CurrentSourceInfoKey;
+
+                if (string.IsNullOrEmpty(sourceKey))
+                    sourceKey = "none";
+
+                PostStatusMessage(new RoutingStateMessage
+                {
+                    SelectedSourceKey = sourceKey
+                });
+            }
+        }
+    }
+
+    public class RoutingStateMessage : DeviceStateMessageBase
+    {
+        [JsonProperty("selectedSourceKey")]
+        public string SelectedSourceKey { get; set; }
+    }
+}