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)/blog/page.tsx

@@ -1,6 +1,7 @@
 import type { Metadata } from 'next';
 
 import { allPosts } from 'contentlayer/generated';
+
 import PostPreview from '~/(marketing)/blog/components/post-preview';
 import { SitePageHeader } from '~/(marketing)/components/site-page-header';
 import appConfig from '~/config/app.config';