[UI] Controller and Route for FAQ page created as well as basic template structure

src/Controller/FaqHome.php

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+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * FAQ main page
+ *
+ * @package  GNUsocial
+ * @category Controller
+ *
+ * @author    Eliseu Amaro <eliseu@fc.up.pt>
+ * @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace App\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+
+class FaqHome extends AbstractController
+{
+    public function __invoke()
+    {
+        return $this->render('faq/home.html.twig', []);
+    }
+}

src/Routes/Faq.php

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+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * Define FAQ's main routes
+ *
+ * @package  GNUsocial
+ * @category Router
+ *
+ * @author    Eliseu Amaro <eliseu@fc.up.pt>
+ * @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace App\Routes;
+
+use App\Controller\FaqHome;
+use App\Core\RouteLoader;
+
+abstract class Faq
+{
+    public static function load(RouteLoader $r): void
+    {
+        $r->connect('doc_faq', '/doc/faq', FaqHome::class);
+    }
+}

templates/faq/home.html.twig

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+{% extends "base.html.twig" %}