Add default session expiration

- Sets default cookie lifetime to use PHP.ini value.
- Adds bn-ng-idle to handle idle user.
- Sets default timeout to 3600 seconds to log the user out and redirect to the login page.
- Displays a warning message to the user on session timeout.

Signed-off-by: Dillon-Brown <dillon.brown@salesagility.com>

config/packages/framework.yaml

@@ -5,6 +5,7 @@ framework:
 
   # Note: Session will only be started if you read or write from it.
   session:
+    cookie_lifetime: null
     handler_id: null
     cookie_secure: auto
     cookie_samesite: lax
@@ -13,4 +14,4 @@ framework:
     log: true
 
   assets:
-    base_path: '/public'
+    base_path: '/public'