Updated the PHP supported versions to mention v17 and dropped v12.
Removed mention of plugins we no longer ship.
Updated example PHP versions to be 8.1
Updated example Altis version to 17.
Added v17 upgrade guide.
Documented removal of the Analytics module.
Updated the PHP supported versions to mention v17 and dropped v12. Removed mention of plugins we no longer ship. Updated example PHP versions to be 8.1 Updated example Altis version to 17. Added v17 upgrade guide. Documented removal of the Analytics module.