chore: upgrade rails to 7.0 and other dependencies

app/views/messages/_list.html.haml

@@ -17,7 +17,7 @@
             %dd= message.mail_from || "none"
 
         .messageList__meta
-          %p.messageList__timestamp= message.timestamp.in_time_zone.to_s(:long)
+          %p.messageList__timestamp= message.timestamp.in_time_zone.to_fs(:long)
           %p.messageList__status
             - if message.read?
               %span.label.label--purple Opened