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/WebApiHandlers/MobileAuthRequestHandler.cs

@@ -0,0 +1,59 @@
+using Crestron.SimplSharp.WebScripting;
+using Newtonsoft.Json;
+using PepperDash.Core;
+using PepperDash.Core.Web.RequestHandlers;
+using PepperDash.Essentials.Core.Web;
+using System;
+using System.Threading.Tasks;
+
+namespace PepperDash.Essentials.WebApiHandlers
+{
+    public class MobileAuthRequestHandler : WebApiBaseRequestAsyncHandler
+    {
+        private readonly MobileControlSystemController mcController;
+
+        public MobileAuthRequestHandler(MobileControlSystemController controller) : base(true)
+        {
+            mcController = controller;
+        }
+
+        protected override async Task HandlePost(HttpCwsContext context)
+        {
+            try
+            {
+                var requestBody = EssentialsWebApiHelpers.GetRequestBody(context.Request);
+
+                var grantCode = JsonConvert.DeserializeObject<AuthorizationRequest>(requestBody);
+
+                if (string.IsNullOrEmpty(grantCode?.GrantCode))
+                {
+                    Debug.LogMessage(Serilog.Events.LogEventLevel.Error, "Missing grant code");
+                    context.Response.StatusCode = 400;
+                    context.Response.StatusDescription = "Missing grant code";
+                    context.Response.End();
+                    return;
+                }
+
+                var response = await mcController.ApiService.SendAuthorizationRequest(mcController.Host, grantCode.GrantCode, mcController.SystemUuid);
+
+                Debug.LogMessage(Serilog.Events.LogEventLevel.Debug, $"response received");
+                if (response.Authorized)
+                {
+                    mcController.RegisterSystemToServer();
+                }
+
+
+                context.Response.StatusCode = 200;
+                var responseBody = JsonConvert.SerializeObject(response, Formatting.None);
+                context.Response.ContentType = "application/json";
+                context.Response.Headers.Add("Content-Type", "application/json");
+                context.Response.Write(responseBody, false);
+                context.Response.End();
+            }
+            catch (Exception ex)
+            {
+                Debug.LogMessage(ex, "Exception recieved authorizing system");
+            }
+        }
+    }
+}