* Move adding webhooks to extension methods
* Clean up WebhookEventCollectionBuilder
* Rename AddAllAvailableWebhooks to AddCmsWebhooks and internalize defaults
* Use fluent CmsWebhookEventCollectionBuilder for adding CMS specific webhook events
* Split media and media type webhook events
* Use fluent CmsUserWebhookEventCollectionBuilder for adding CMS user specific webhook events
* Rename extension methods and add onlyDefault parameter
* Remove duplicate UserForgotPasswordRequestedWebhookEvent
* Add document type webhook events and use fluent builders for content and content types
* Use fluent WebhookEventCollectionBuilderCmsMember for adding member/member group webhook events
* Use fluent WebhookEventCollectionBuilderCmsTemplate for template/partial view webhook events
* Use fluent WebhookEventCollectionBuilderCmsFile for file based webhook events (instead of only template/partial view)
* Move all webhook events to Umbraco.Cms.Core.Webhooks.Events namespace
* Reorder AddFile method and update documentation
