Translate datetime object with icu: split date and time

Translate datetime within icu format

src/Bundle/ChillMainBundle/translations/messages+intl-icu.fr.yaml

@@ -45,6 +45,9 @@ workflow:
             few {# workflows}
             other {# workflows}
         }
+    signature_zone:
+        has_signed_statement: 'A signé le {datetime, date, short} à {datetime, time, short}'
+
 
 duration:
     minute: >-