Feature: add timespent on "show" page

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

@@ -45,3 +45,12 @@ workflow:
             few {# workflows}
             other {# workflows}
         }
+
+duration:
+    minute: >-
+        {m, plural,
+            =0 {Aucune durée}
+            one {# minute}
+            few {# minutes}
+            other {# minutes}
+        }