Add public form to add completions

config/locales/en.yml

@@ -170,6 +170,8 @@ en:
     edit:
       notice: Completion updated
       title: Edit completion
+    form:
+      validate_name: "Validate a puzzle for %{name}"
     new:
       notice: Completion added
       title: New completion

config/locales/fr.yml

@@ -141,6 +141,8 @@ fr:
     edit:
       notice: Complétion modifiée
       title: Modifier la complétion
+    form:
+      validate_name: "Valider un puzzle pour %{name}"
     new:
       notice: Complétion ajoutée
       title: Ajout d'une complétion