Implement an upgrade of the codebase to use Slim Framework version 4, which includes the following changes:
- Updating to Slim version 4 and the corresponding AzuraCore updates.
- Making all objects PSR-7 Request/Response agnostic (and creating RequestHelper and ResponseHelper objects to interact with the PSR-7 Req/Resp objects).
- Moving to PHP-DI as a DI container and implementing its autowiring support.
* Initial renaming to a single global App\ namespace.
* Move CSRF/Flash under Session, move Session under Request
* Use new Request Station helper
* Unify App/Acl and App/Acl/StationAcl
* Alphabetize composer.json
Buster "Silver Eagle" Neece
Vaalyn
Buster "Silver Eagle" Neece
Denny Brandes