* Code cleaning and fix some small errors using Phpstan
* Configure pre-commit to run Phpstan before each commit
* Some little improvments and logging, mail, smarty & URL libs
* Add Sentry integration
* Add Webstat JS code inclusion
* Install Smarty dependency using composer
Breaking changes:
* Rename Event class as HookEvent to avoid conflict with PECL event
* URL with refresh GET parameter now automatically trigger redirection without it
after page loading to avoid to keep it in URL
