feat(settings): add general config for instance (site name, description and icon)

modules/Admin/Language/en/Settings.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  2020 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+return [
+    'title' => 'General settings',
+    'form' => [
+        'site_section_title' => 'Instance',
+        'site_icon' => 'Site icon',
+        'site_icon_delete' => 'Delete site icon',
+        'site_icon_hint' => 'Site icons are what you see on your browser tabs, bookmarks bar, and when you add a website as a shortcut on mobile devices.',
+        'site_icon_helper' => 'Icon must be squared with at least 512px wide and tall.',
+        'site_name' => 'Site name',
+        'site_description' => 'Site description',
+        'submit' => 'Save',
+    ],
+];