Reorder translations and add missing prefixes

- files should be prefixed with code_ocean/
- the markdown editor is part of the application (helper)

config/locales/de/tip.yml

@@ -0,0 +1,12 @@
+---
+de:
+  activerecord:
+    attributes:
+      tip:
+        description: Beschreibung
+        example: Beispiel
+        title: Titel
+    models:
+      tip:
+        one: Tipp
+        other: Tipps