FEAT #26917 TIME 2:00 initialize structure for webhook

...natureBook/Application/Webhook/RetrieveSignedResource.php

src/backend/SignatureBook/Domain/CurlRequest.php

...ckend/SignatureBook/Domain/Ports/CurlServiceInterface.php

...reBook/Domain/Ports/SignedResourceRepositoryInterface.php

src/backend/SignatureBook/Domain/SignedResource.php

...tureBook/Infrastructure/Controllers/WebhookController.php

src/backend/SignatureBook/Infrastructure/CurlService.php

...ok/Infrastructure/Repository/SignedResourceRepository.php