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/DevicePresetsModelMessenger.cs

@@ -0,0 +1,101 @@
+using Newtonsoft.Json;
+using PepperDash.Core;
+using PepperDash.Core.Logging;
+using PepperDash.Essentials.Core;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
+using PepperDash.Essentials.Core.Presets;
+using System;
+using System.Collections.Generic;
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    public class DevicePresetsModelMessenger : MessengerBase
+    {
+        private readonly ITvPresetsProvider _presetsDevice;
+
+        public DevicePresetsModelMessenger(string key, string messagePath, ITvPresetsProvider presetsDevice)
+            : base(key, messagePath, presetsDevice as Device)
+        {
+            _presetsDevice = presetsDevice;
+        }
+
+        private void SendPresets()
+        {
+            PostStatusMessage(new PresetStateMessage
+            {
+                Favorites = _presetsDevice.TvPresets.PresetsList
+            });
+        }
+
+        private void RecallPreset(ISetTopBoxNumericKeypad device, string channel)
+        {
+            _presetsDevice.TvPresets.Dial(channel, device);
+        }
+
+        private void SavePresets(List<PresetChannel> presets)
+        {
+            _presetsDevice.TvPresets.UpdatePresets(presets);
+        }
+
+
+        #region Overrides of MessengerBase
+
+#if SERIES4
+        protected override void RegisterActions()
+#else
+        protected override void CustomRegisterWithAppServer(MobileControlSystemController appServerController)
+#endif
+        {
+            AddAction("/presets/fullStatus", (id, content) => {
+                this.LogInformation("getting full status for client {id}", id);
+                try
+                {
+                    SendPresets();
+                } catch(Exception ex)
+                {
+                    Debug.LogMessage(ex, "Exception sending preset full status", this);
+                }
+            });
+
+            AddAction("/presets/recall", (id, content) =>
+            {
+                var p = content.ToObject<PresetChannelMessage>();
+
+
+                if (!(DeviceManager.GetDeviceForKey(p.DeviceKey) is ISetTopBoxNumericKeypad dev))
+                {
+                    this.LogDebug("Unable to find device with key {0}", p.DeviceKey);
+                    return;
+                }
+
+                RecallPreset(dev, p.Preset.Channel);
+            });
+
+            AddAction("/presets/save", (id, content) =>
+            {
+                var presets = content.ToObject<List<PresetChannel>>();
+
+                SavePresets(presets);
+            });
+
+            _presetsDevice.TvPresets.PresetsSaved += (p) => SendPresets();
+        }
+
+        #endregion
+    }
+
+    public class PresetChannelMessage
+    {
+        [JsonProperty("preset")]
+        public PresetChannel Preset;
+
+        [JsonProperty("deviceKey")]
+        public string DeviceKey;
+    }
+
+    public class PresetStateMessage : DeviceStateMessageBase
+    {
+        [JsonProperty("favorites", NullValueHandling = NullValueHandling.Ignore)]
+        public List<PresetChannel> Favorites { get; set; } = new List<PresetChannel>();
+    }
+}