Bug 34275: Add toggle switch for basic/advanced cataloging editors

Bug 34275: Add toggle switch for basic/advanced cataloging editors

To test:
1. Apply patch and regenerate CSS. (https://wiki.koha-community.org/wiki/Working_with_SCSS_in_the_OPAC_and_staff_interface)
2. Turn on EnableAdvancedCatalogingEditor.
3. Go to cataloging > 'New record'
4. In the upper left notice a new toggle switch labeled 'Editor:'.
5. Try toggling the switch back and forth to move between editors. Verify it works correecly.
6. Try editing an existing record and make sure the toggle works well when editing records.
7. Try the other method of switch editors, Settings > Switch to basic/advanced editor. Make sure it works the same as always
8. Turn off EnableAdvancedCatalogingEditor, make sure the toggle button is no longer present.

Signed-off-by: Eesther <esther@bywatersolutions.com>
Signed-off-by: Brendan Lawlor <blawlor@clamsnet.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>