Remove billing and checkout redirect buttons and related services

Deleted the billing-redirect-button, checkout-redirect-button, and embedded-stripe-checkout components. Additionally, removed the shadcn directory, which encompassed billing-related icons. This change streamlines the subscription settings interface and organizes the system's payment management. This update is a stepping stone towards improving the billing system's overall architecture.

apps/web/app/(marketing)/docs/[...slug]/page.tsx

@@ -4,15 +4,16 @@ import { notFound } from 'next/navigation';
 
 import { allDocumentationPages } from 'contentlayer/generated';
 import { ChevronLeftIcon, ChevronRightIcon } from 'lucide-react';
+
+import { If } from '@kit/ui/if';
+import { Mdx } from '@kit/ui/mdx';
+
 import { SitePageHeader } from '~/(marketing)/components/site-page-header';
 import { DocsCards } from '~/(marketing)/docs/components/docs-cards';
 import { DocumentationPageLink } from '~/(marketing)/docs/components/documentation-page-link';
 import { getDocumentationPageTree } from '~/(marketing)/docs/utils/get-documentation-page-tree';
 import { withI18n } from '~/lib/i18n/with-i18n';
 
-import { If } from '@kit/ui/if';
-import { Mdx } from '@kit/ui/mdx';
-
 const getPageBySlug = cache((slug: string) => {
   return allDocumentationPages.find((post) => post.resolvedPath === slug);
 });

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

@@ -1,4 +1,5 @@
 import { allDocumentationPages } from 'contentlayer/generated';
+
 import appConfig from '~/config/app.config';
 import { withI18n } from '~/lib/i18n/with-i18n';