Suppress navbar and footer on account security pages (#35744)

* Suppress skip-to-content link on pages without a navbar

* Add main content as target area for the skip link on the library page

* Suppress navbar, footer and skip-to-content on account security pages

GitOrigin-RevId: a85fac5667d84c6f60577cd0ea469cd215554cc4

services/web/app/views/user/primaryEmailCheck.pug

@@ -1,6 +1,8 @@
 extends ../layout-website-redesign
 
 block vars
+	- var suppressNavbar = true
+	- var suppressFooter = true
 	- isWebsiteRedesign = true
 
 block content