Create pages for Incompatibilities and Feature Differences Between MariaDB and MySQL 8.x, specifically for the 11.8 and 12.3 LTSs

Create pages for "Incompatibilities and Feature Differences Between MariaDB and MySQL 8.x" specifically for the 11.8 and 12.3 LTSs, similar to https://mariadb.com/docs/release-notes/community-server/about/compatibility-and-differences/incompatibilities-and-feature-differences-between-mariadb-11-4-and-mysql-8. This should also include the Functions, and System Variables, sub-pages.