i18n(de): Add missing translations (#8840)

Related: https://github.com/FreshRSS/FreshRSS/issues/8839

README.fr.md

@@ -228,7 +228,7 @@ Voir le [dépôt dédié à ces extensions](https://github.com/FreshRSS/Extensio
 | Langage | Progression | |
 | - | - | - |
 | Čeština (cs) | ￭￭￭￭￭￭￭￭･･ 82% | [contribuer](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fcs+%2F%28TODO%7CDIRTY%29%24%2F) |
-| Deutsch (de) | ￭￭￭￭￭￭￭￭￭･ 99% | [contribuer](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fde+%2F%28TODO%7CDIRTY%29%24%2F) |
+| Deutsch (de) | ￭￭￭￭￭￭￭￭￭￭ 100% | [contribuer](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fde+%2F%28TODO%7CDIRTY%29%24%2F) |
 | Ελληνικά (el) | ￭￭￭･･･････ 38% | [contribuer](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fel+%2F%28TODO%7CDIRTY%29%24%2F) |
 | English (en) | ￭￭￭￭￭￭￭￭￭￭ 100% | [contribuer](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fen+%2F%28TODO%7CDIRTY%29%24%2F) |
 | English (United States) (en-US) | ￭￭￭￭￭￭￭￭￭￭ 100% | [contribuer](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fen-US+%2F%28TODO%7CDIRTY%29%24%2F) |

README.md

@@ -124,7 +124,7 @@ See the [repository dedicated to those extensions](https://github.com/FreshRSS/E
 | Language | Progress | |
 | - | - | - |
 | Čeština (cs) | ￭￭￭￭￭￭￭￭･･ 82% | [contribute](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fcs+%2F%28TODO%7CDIRTY%29%24%2F) |
-| Deutsch (de) | ￭￭￭￭￭￭￭￭￭･ 99% | [contribute](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fde+%2F%28TODO%7CDIRTY%29%24%2F) |
+| Deutsch (de) | ￭￭￭￭￭￭￭￭￭￭ 100% | [contribute](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fde+%2F%28TODO%7CDIRTY%29%24%2F) |
 | Ελληνικά (el) | ￭￭￭･･･････ 38% | [contribute](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fel+%2F%28TODO%7CDIRTY%29%24%2F) |
 | English (en) | ￭￭￭￭￭￭￭￭￭￭ 100% | [contribute](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fen+%2F%28TODO%7CDIRTY%29%24%2F) |
 | English (United States) (en-US) | ￭￭￭￭￭￭￭￭￭￭ 100% | [contribute](https://github.com/search?q=repo%3AFreshRSS%2FFreshRSS+path%3Aapp%2Fi18n%2Fen-US+%2F%28TODO%7CDIRTY%29%24%2F) |

app/i18n/de/conf.php

@@ -76,7 +76,7 @@ return array(
 		'website' => array(
 			'full' => 'Icon und Name',
 			'icon' => 'Nur Icon',
-			'label' => 'Website',	// TODO
+			'label' => 'Website',	// IGNORE
 			'name' => 'Nur Name',
 			'none' => 'Keine',
 		),

app/i18n/de/sub.php

@@ -29,7 +29,7 @@ return array(
 			'help' => 'URL zu einer <a href="http://opml.org/" target="_blank">OPML Datei</a>, um die Kategorie dynamisch mit Feeds zu befüllen',
 		),
 		'empty' => 'Leere Kategorie',
-		'error' => 'This dynamic OPML category has encountered a problem. Check that the OPML URL is still reachable and that the maximum number of feeds per user has not been exceeded.',	// TODO
+		'error' => 'Diese dynamische OPML-Kategorie hat ein Problem. Prüfen Sie, ob die OPML-URL noch erreichbar ist und die maximale Anzahl an Feeds pro Nutzer nicht überschritten ist.',
 		'expand' => 'Kategorie aufklappen',
 		'information' => 'Information',	// IGNORE
 		'open' => 'Kategorie öffnen',
@@ -187,8 +187,8 @@ return array(
 			'rss' => 'RSS / Atom (Standard)',
 			'xml_xpath' => 'XML + XPath',	// IGNORE
 		),
-		'last-entry-publication-date' => 'Last article published <time datetime="%1$s" title="%1$s">%2$s</time>.',	// TODO
-		'last-entry-received-date' => 'Last article received <time datetime="%1$s" title="%1$s">%2$s</time>.',	// TODO
+		'last-entry-publication-date' => 'Letzter Artikel veröffentlicht <time datetime="%1$s" title="%1$s">%2$s</time>.',
+		'last-entry-received-date' => 'Letzter Artikel empfangen <time datetime="%1$s" title="%1$s">%2$s</time>.',
 		'last-error-date' => 'Letzte fehlerhafte Aktualisierung <time datetime="%1$s" title="%1$s">%2$s</time>.',
 		'last-update' => 'Letzte erfolgreiche Aktualisierung <time datetime="%1$s" title="%1$s">%2$s</time>.',
 		'maintenance' => array(