wip: integrate with typo3 to fetch product and hotel data

config/services.yaml

@@ -96,3 +96,7 @@ services:
                 - '@App\Form\Service\ParticipantTransportationDiscountReplacementFieldHandler'
                 - '@App\Form\Service\ParticipantBulkInsuranceFieldHandler'
                 - '@App\Form\Service\ParticipantInsuranceFieldHandler'
+
+    App\Service\CmsDataService:
+      arguments:
+        $httpClient: '@typo3.client'