surveys to add

[fsolt]

• [ ] look through https://www.vanderbilt.edu/lapop/Seligson-Archive.php

[fsolt]

• [x] Also new AmericasBarometers at http://datasets.americasbarometer.org/database/index.php?freeUser=true

[fsolt]

• [x] new lb2023 (downloaded)

[fsolt]

• [x] fix links to icenes (they have a dataverse now)