Forum post postmessage

Se agregaron las entidades, forum, post y postMessages Se agrego autoMapper

Tsi1.Api/Tsi1.Api/Controllers/ForumController.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Tsi1.BusinessLayer.Interfaces;
+
+namespace Tsi1.Api.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class ForumController : ControllerBase
+    {
+        private readonly IForumService _forumService;
+
+        public ForumController(IForumService forumService)
+        {
+            _forumService = forumService;
+        }
+    }
+}