PHP 8.4

[pwaring]

PHP 8.4 has been around for a while now, so look at what needs to be changed to support it. This does assume that all dependencies (especially Slim) support 8.4. Also if there are any features in 8.4 which will allow the code to be cleaned up.

Before migrating, create a separate php83 branch to freeze 8.3 support.

[pwaring]

Native lazy objects will need to be enabled in Doctrine ORM setup as this is a requirement once Doctrine has been updated to the latest version that supports 8.4.