Add lightbox navigation arrows and author metadata display

languages/en.json

@@ -4,5 +4,6 @@
 		"name": "Blowdit",
 		"description": "A Bludit theme inspired by the Blowfish Hugo theme. Right sidebar, reading time, a light/dark mode toggle and a navbar with social icons and static pages."
 	},
-	"Toggle theme": "Toggle theme"
+	"Toggle theme": "Toggle theme",
+	"Author": "Author"
 }