chore: Update .env.example and pint.json configurations

- Updated APP_TIMEZONE to Europe/Amsterdam in .env.example
- Changed SESSION_DRIVER from file to database in .env.example
- Modified "preset" value to "laravel" in pint.json

.env.example

@@ -2,7 +2,7 @@ APP_NAME=Heimerdinger
 APP_ENV=local
 APP_KEY=
 APP_DEBUG=true
-APP_TIMEZONE=UTC
+APP_TIMEZONE=Europe/Amsterdam
 APP_URL=http://127.0.0.1:8000
 
 APP_LOCALE=en
@@ -49,7 +49,7 @@ BROADCAST_CONNECTION=log
 CACHE_STORE=file
 FILESYSTEM_DISK=local
 QUEUE_CONNECTION=sync
-SESSION_DRIVER=file
+SESSION_DRIVER=database
 SESSION_LIFETIME=120
 SESSION_ENCRYPT=false
 SESSION_PATH=/