Implement custom roles and improve permissions logic

The commit refactors the handling of account roles and enhances permissions checks. The account role has been shifted to use a string type, providing the ability to define custom roles. It also introduces the RolesDataProvider component, which stipulates role-related data for different forms and tables. The modification goes further to consider user role hierarchy in permissions checks, offering a more granular access control.

apps/web/app/(marketing)/docs/layout.tsx

@@ -1,4 +1,3 @@
-import type { DocumentationPage } from 'contentlayer/generated';
 import { allDocumentationPages } from 'contentlayer/generated';
 
 import DocsNavigation from '~/(marketing)/docs/_components/docs-navigation';