Site security updates

So work needed
Critical issues:
-Update PHP from 7.4 to 8.5 and update themes-plugins as required
-Update Stockholm from 9.6 to 9.7 or higher, and update layout as required - keeping close to current layout

Update these high risk:
-Stockholm core and update themes-plugins as required
-WPBakery page builder

Fix/Replace:
- Replace Slider Revolution [has a high risk] with a free WP slider like Smart Slider 3.
-advanced WP columns

Check for other issues and site improvement options