* Store breadcrumbs block: Gate global styles added via experimental flags to the feature plugin.
* Rename the const to featurePluginSupport and invoke it on block registration.
* Address CR
* Initial structure for the breadcrumbs block
* ditch inline comment
* Fine-tune the store breadcrumbs
* Disable the breadcrumbs block for regular posts & pages
* Update the breadcrumbs block details.
* Add tests
* rely on sprintf to render the breadcrumb
* Ditch usesContext.
* Add a link to the breadcrumb editor preview
* Disable all pointer-events for the breadcrumb link in the editor preview
* Add the align attribute
* Use the Disabled component to prevent interactions and update the copy for the block description.
Patricia Hillebrandt