MAPG-115 add new classes to store request data (get, post, session, etc.)

src/Interfaces/Request/IRequest.php

@@ -0,0 +1,14 @@
+<?php namespace MapGuesser\Interfaces\Request;
+
+use MapGuesser\Interfaces\Authentication\IUser;
+
+interface IRequest
+{
+    public function query(string $key);
+
+    public function post(string $key);
+
+    public function session(): ISession;
+
+    public function user(): ?IUser;
+}