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/ActionPathsHandler.cs

@@ -0,0 +1,52 @@
+using Crestron.SimplSharp.WebScripting;
+using Newtonsoft.Json;
+using PepperDash.Core.Web.RequestHandlers;
+using PepperDash.Essentials.AppServer.Messengers;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace PepperDash.Essentials.WebApiHandlers
+{
+    public class ActionPathsHandler : WebApiBaseRequestHandler
+    {
+        private readonly MobileControlSystemController mcController;
+        public ActionPathsHandler(MobileControlSystemController controller) : base(true)
+        {
+            mcController = controller;
+        }
+
+        protected override void HandleGet(HttpCwsContext context)
+        {
+            var response = JsonConvert.SerializeObject(new ActionPathsResponse(mcController));
+
+            context.Response.StatusCode = 200;
+            context.Response.ContentType = "application/json";
+            context.Response.Headers.Add("Content-Type", "application/json");
+            context.Response.Write(response, false);
+            context.Response.End();
+        }
+    }
+
+    public class ActionPathsResponse
+    {
+        [JsonIgnore]
+        private readonly MobileControlSystemController mcController;
+
+        [JsonProperty("actionPaths")]
+        public List<ActionPath> ActionPaths => mcController.GetActionDictionaryPaths().Select((path) => new ActionPath { MessengerKey = path.Item1, Path = path.Item2}).ToList();
+
+        public ActionPathsResponse(MobileControlSystemController mcController)
+        {
+            this.mcController = mcController;
+        }
+    }
+
+    public class ActionPath
+    {
+        [JsonProperty("messengerKey")]
+        public string MessengerKey { get; set; }
+
+        [JsonProperty("path")]
+        public string Path { get; set; }
+    }
+}