Update docs de_de.lang, enable Docs page

lang/de_de.lang

@@ -56,6 +56,18 @@ respondo_entry_yform_table_dataset_id = Datensatz-ID
 respondo_entry_yform_table_key = YForm-Tabelle
 respondo_table_key_empty = Ohne YForm-Tabelle
 
+# Docs
+
+respondo_docs_intro = Intro
+respondo_docs_comments = Kommentare
+respondo_docs_threads = Threads
+respondo_docs_reviews = Rezensionen
+respondo_docs_guestbook = Gästebuch
+respondo_docs_moderation = Moderation
+respondo_docs_spam = Spam
+respondo_docs_settings = Einstellungen
+respondo_docs_fragments = Fragmente
+
 # Moderation
 
 respondo_moderation_delete = Löschen

package.yml

@@ -56,7 +56,6 @@ pages:
         perm: admin
     docs:
         title: translate:respondo_docs
-        subPath: README.md
         icon: rex-icon fa-info-circle
         itemclass: pull-right
         perm: respondo[docs]

pages/docs.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * @var rex_addon $this
+ * @psalm-scope-this rex_addon
+ */
+
+$mdFiles = [];
+foreach (glob(rex_addon::get('respondo')->getPath('docs') . '/*.md') ?: [] as $file) {
+    $mdFiles[mb_substr(basename($file), 0, -3)] = $file;
+}
+
+$currenMDFile = rex_request('mdfile', 'string', '01_intro');
+if (!array_key_exists($currenMDFile, $mdFiles)) {
+    $currenMDFile = '01_intro';
+}
+
+$page = rex_be_controller::getPageObject('respondo/docs');
+
+if (null !== $page) {
+    foreach ($mdFiles as $key => $mdFile) {
+        $keyWithoudPrio = mb_substr($key, 3);
+        $currenMDFileWithoudPrio = mb_substr($currenMDFile, 3);
+        $page->addSubpage(
+            (new rex_be_page($key, rex_i18n::msg('respondo_docs_' . $keyWithoudPrio)))
+            ->setSubPath($mdFile)
+            ->setHref('index.php?page=respondo/docs&mdfile=' . $key)
+            ->setIsActive($key == $currenMDFile),
+        );
+    }
+}
+
+echo rex_view::title($this->i18n('respondo_title'));
+
+[$Toc, $Content] = rex_markdown::factory()->parseWithToc(rex_file::require($mdFiles[$currenMDFile]), 2, 3, [
+    rex_markdown::SOFT_LINE_BREAKS => false,
+    rex_markdown::HIGHLIGHT_PHP => true,
+]);
+
+$fragment = new rex_fragment();
+$fragment->setVar('content', $Content, false);
+$fragment->setVar('toc', $Toc, false);
+$content = $fragment->parse('core/page/docs.php');
+
+$fragment = new rex_fragment();
+$fragment->setVar('title', rex_i18n::msg('package_help') . ' ', false);
+$fragment->setVar('body', $content, false);
+echo $fragment->parse('core/page/section.php');