Move admin/addons to src/Module

- Add Module\Admin\Addons\Index class
- Add route for admin/addons
- Add addons admin aside menu entry
- Remove unused template admin/addons.tpl from base and frio
- Remove addon list from mod/admin

src/Module/Admin/Addons/Index.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace Friendica\Module\Admin\Addons;
+
+use Friendica\Content\Text\Markdown;
+use Friendica\Core\Addon;
+use Friendica\Core\Config;
+use Friendica\Core\L10n;
+use Friendica\Core\Renderer;
+use Friendica\Core\System;
+use Friendica\Database\DBA;
+use Friendica\Module\BaseAdminModule;
+
+class Index extends BaseAdminModule
+{
+	public static function content()
+	{
+		parent::content();
+
+		$a = self::getApp();
+
+		// reload active themes
+		if (!empty($_GET['action'])) {
+			parent::checkFormSecurityTokenRedirectOnError('/admin/addons', 'admin_addons', 't');
+
+			switch ($_GET['action']) {
+				case 'reload':
+					Addon::reload();
+					info('Addons reloaded');
+					break;
+
+				case 'toggle' :
+					$addon = defaults($_GET, 'addon', '');
+					if (Addon::isEnabled($addon)) {
+						Addon::uninstall($addon);
+						info(L10n::t('Addon %s disabled.', $addon));
+					} elseif (Addon::install($addon)) {
+						info(L10n::t('Addon %s enabled.', $addon));
+					} else {
+						info(L10n::t('Addon %s failed to install.', $addon));
+					}
+
+					break;
+
+			}
+
+			$a->internalRedirect('admin/addons');
+		}
+
+		$addons_admin = [];
+		$addonsAdminStmt = DBA::select('addon', ['name'], ['plugin_admin' => 1], ['order' => ['name']]);
+		foreach (DBA::toArray($addonsAdminStmt) as $addon) {
+			$addons_admin[] = $addon['name'];
+		}
+
+		$addons = Addon::getAvailableList();
+
+		$t = Renderer::getMarkupTemplate('admin/addons/index.tpl');
+		return Renderer::replaceMacros($t, [
+			'$title' => L10n::t('Administration'),
+			'$page' => L10n::t('Addons'),
+			'$submit' => L10n::t('Save Settings'),
+			'$reload' => L10n::t('Reload active addons'),
+			'$baseurl' => System::baseUrl(true),
+			'$function' => 'addons',
+			'$addons' => $addons,
+			'$pcount' => count($addons),
+			'$noplugshint' => L10n::t('There are currently no addons available on your node. You can find the official addon repository at %1$s and might find other interesting addons in the open addon registry at %2$s', 'https://github.com/friendica/friendica-addons', 'http://addons.friendi.ca'),
+			'$form_security_token' => parent::getFormSecurityToken('admin_addons'),
+		]);
+	}
+}