feat: split booking between participants and applicant

addresses #869f2q1vu

config/services.yaml

@@ -302,6 +302,7 @@ services:
                 - 'App\Form\Service\ParticipantDropOffFieldHandler'
                 - 'App\Form\Service\ParticipantRentalInsuranceFieldHandler'
                 - 'App\Form\Service\ParticipantLicensePlateFieldHandler'
+                - 'App\Form\Service\ParticipantEmailFieldHandler'
                 # Complex handlers with dependencies - use service references
                 - '@App\Form\Service\ParticipantDateOfBirthFieldHandler'
                 - '@App\Form\Service\ParticipantTransportationDiscountReplacementFieldHandler'