enh: add a message for users with Javascript disabled

Currently, the user sees a blank page if they have
Javascript disabled with no indication as to why.

This commit adds a noscript message so users know
they have to enable Javascript to use Wiki.js

Signed-off-by: Gary Kim <gary@garykim.dev>

dev/templates/master.pug

@@ -92,6 +92,7 @@ html(lang=siteConfig.lang)
     block head
 
   body
+    noscript='Wiki.js requires Javascript to use. Please enable Javascript and reload the page'
     != analyticsCode.bodyStart
     block body
     != analyticsCode.bodyEnd