Reverted previewOption extension-type

Re-engineered to make a "urlProvider" kind for `workspaceActionMenuItem`.
This is to simplify the extension point and surrounding logic.

Author: leekelleher

src/Umbraco.Web.UI.Client/src/packages/documents/documents/index.ts

@@ -9,7 +9,6 @@ export * from './global-contexts/index.js';
 export * from './item/index.js';
 export * from './modals/index.js';
 export * from './paths.js';
-export * from './preview/index.js';
 export * from './publishing/index.js';
 export * from './recycle-bin/index.js';
 export * from './reference/index.js';

src/Umbraco.Web.UI.Client/src/packages/documents/documents/preview/index.ts

@@ -1,4 +1,4 @@
-import { manifests as previewOptionManifests } from './preview-option/manifests.js';
+import { manifests as previewOptionManifests } from './workspace-action-menu-item/manifests.js';
 import { manifests as workspaceActionManifests } from './workspace-action/manifests.js';
 import type { UmbExtensionManifestKind } from '@umbraco-cms/backoffice/extension-registry';