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/hint.yml

@@ -0,0 +1,13 @@
+---
+de:
+  activerecord:
+    attributes:
+      hint:
+        locale: Sprache
+        message: Nachricht
+        name: Name
+        regular_expression: Regulärer Ausdruck
+    models:
+      hint:
+        one: Hinweis
+        other: Hinweise