V14: Fixup webhook endpoints

[Zeegaan]

Notes

• The webhook get endpoint to get all webhooks did not work, as it would throw an error about not knowing how to map, this has been fixed by using the Presentation factory instead, as there is no WebhookMapDefinition
• The item endpoint would always return 0 items, as the GetByIdsAsync webhook repository method did not work, this has been remedied by refactoring the method to have similar functionality to GetAsync

How to test

• Start on v13
• Create a couple of webhooks
• Migrate to v14 (this branch)
• Call the webhook get endpoint to get all webhooks, this should return the correct number.
• Call the item endpoint for webhook, with one or more ids (you can get these ids from the all endpoint you just called), and assert it returns the correct number of items

[elit0451]

Looks good 💪