Roll out the IF Visualiser

[zanete]

Scope of work:

• remove the "become a watcher" button from the visualiser page
• add a menu item called "Documentation" and takes to IF docs https://if.greensoftware.foundation/intro
• add link in menu called "Home" to go back to the viz starting page
• make IF logo takes to if homepage https://if.greensoftware.foundation/
• deploy to https://viz.if.greensoftware.foundation
• update IF homepage https://if.greensoftware.foundation/ to add a new menu item called "Visualizer" that takes people to https://viz.if.greensoftware.foundation