Add remaining project files

Controllers/NotificationsNegotiate.cs

@@ -0,0 +1,32 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using static DeluxeBackend.Enums;
+
+namespace DeluxeBackend.Controllers
+{
+    [Route("Notifications/hub/v1/negotiate")]
+    [ApiController]
+    public class NotificationsNegotiate: ControllerBase
+    {
+        [HttpGet]
+        [HttpPost]
+        [Authorize]
+        public async Task<IActionResult> Ns()
+        {
+            return Ok(new
+            {
+                negotiateVersion = 2,
+                //connectionId = "meow",
+                //accessToken = "Meow",
+                availableTransports = new[]
+                {
+                    new
+                    {
+                        transport = "WebSockets",
+                        transferFormats = new[] { "Text", "Binary" }
+                    }
+                }
+            });
+        }
+    }
+}