Unify workspace dropdowns; Update layouts (#458)

Unified Account and Workspace drop-downs; Layout updates, now header lives within the PageBody component; Sidebars now use floating variant

apps/web/app/[locale]/not-found.tsx

@@ -0,0 +1,26 @@
+import { getTranslations } from 'next-intl/server';
+
+import { ErrorPageContent } from '~/components/error-page-content';
+
+export const generateMetadata = async () => {
+  const t = await getTranslations('common');
+  const title = t('notFound');
+
+  return {
+    title,
+  };
+};
+
+const NotFoundPage = async () => {
+  return (
+    <div className={'flex h-screen flex-1 flex-col'}>
+      <ErrorPageContent
+        statusCode={'common.pageNotFoundHeading'}
+        heading={'common.pageNotFound'}
+        subtitle={'common.pageNotFoundSubHeading'}
+      />
+    </div>
+  );
+};
+
+export default NotFoundPage;