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/SystemMonitorMessenger.cs

@@ -0,0 +1,116 @@
+using Crestron.SimplSharp;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using PepperDash.Core;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
+using PepperDash.Essentials.Core.Monitoring;
+using System;
+using System.Threading.Tasks;
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    public class SystemMonitorMessenger : MessengerBase
+    {
+        private readonly SystemMonitorController systemMonitor;
+
+        public SystemMonitorMessenger(string key, SystemMonitorController sysMon, string messagePath)
+            : base(key, messagePath, sysMon)
+        {
+            systemMonitor = sysMon ?? throw new ArgumentNullException("sysMon");
+
+            systemMonitor.SystemMonitorPropertiesChanged += SysMon_SystemMonitorPropertiesChanged;
+
+            foreach (var p in systemMonitor.ProgramStatusFeedbackCollection)
+            {
+                p.Value.ProgramInfoChanged += ProgramInfoChanged;
+            }
+
+            CrestronConsole.AddNewConsoleCommand(s => SendFullStatusMessage(), "SendFullSysMonStatus",
+                "Sends the full System Monitor Status", ConsoleAccessLevelEnum.AccessOperator);
+        }
+
+        /// <summary>
+        /// Posts the program information message
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void ProgramInfoChanged(object sender, ProgramInfoEventArgs e)
+        {
+            if (e.ProgramInfo != null)
+            {
+                //Debug.Console(1, "Posting Status Message: {0}", e.ProgramInfo.ToString());
+                PostStatusMessage(JToken.FromObject(e.ProgramInfo)
+                );
+            }
+        }
+
+        /// <summary>
+        /// Posts the system monitor properties
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void SysMon_SystemMonitorPropertiesChanged(object sender, EventArgs e)
+        {
+            SendSystemMonitorStatusMessage();
+        }
+
+        private void SendFullStatusMessage()
+        {
+            SendSystemMonitorStatusMessage();
+
+            foreach (var p in systemMonitor.ProgramStatusFeedbackCollection)
+            {
+                PostStatusMessage(JToken.FromObject(p.Value.ProgramInfo)
+                );
+            }
+        }
+
+        private void SendSystemMonitorStatusMessage()
+        {
+            Debug.Console(1, "Posting System Monitor Status Message.");
+
+            // This takes a while, launch a new thread
+            Task.Run(() => PostStatusMessage(JToken.FromObject(new SystemMonitorStateMessage
+                {
+
+                    TimeZone = systemMonitor.TimeZoneFeedback.IntValue,
+                    TimeZoneName = systemMonitor.TimeZoneTextFeedback.StringValue,
+                    IoControllerVersion = systemMonitor.IoControllerVersionFeedback.StringValue,
+                    SnmpVersion = systemMonitor.SnmpVersionFeedback.StringValue,
+                    BacnetVersion = systemMonitor.BaCnetAppVersionFeedback.StringValue,
+                    ControllerVersion = systemMonitor.ControllerVersionFeedback.StringValue
+                })
+            ));
+        }
+
+#if SERIES4
+        protected override void RegisterActions()
+#else
+        protected override void CustomRegisterWithAppServer(MobileControlSystemController appServerController)
+#endif
+        {
+            AddAction("/fullStatus", (id, content) => SendFullStatusMessage());
+        }
+    }
+
+    public class SystemMonitorStateMessage
+    {
+        [JsonProperty("timeZone", NullValueHandling = NullValueHandling.Ignore)]
+        public int TimeZone { get; set; }
+
+        [JsonProperty("timeZone", NullValueHandling = NullValueHandling.Ignore)]
+        public string TimeZoneName { get; set; }
+
+        [JsonProperty("timeZone", NullValueHandling = NullValueHandling.Ignore)]
+        public string IoControllerVersion { get; set; }
+
+        [JsonProperty("timeZone", NullValueHandling = NullValueHandling.Ignore)]
+        public string SnmpVersion { get; set; }
+
+        [JsonProperty("timeZone", NullValueHandling = NullValueHandling.Ignore)]
+        public string BacnetVersion { get; set; }
+
+        [JsonProperty("timeZone", NullValueHandling = NullValueHandling.Ignore)]
+        public string ControllerVersion { get; set; }
+    }
+}