Remove unused code and classes.
Clean up code to remove all named constant from them and throw
deprecation alerts if used.
Add basic psalm setup in root folder and remove from www folder
All static Session:: calls (except for checking valid session name) are
converted to object type. This Object is passed on to Login, Admin
Backend and any other class that needs basic session checking
Smarty extended class is now included in checks and is fixed.
Add the lib/ folder to the composer.json autoloader block so we can use
the composer autoloader and not the one from CoreLibs
Added an autoloader load test backend file
