B2B-88: add starter kit structure and elements

packages/shared/src/hooks/index.ts

@@ -0,0 +1 @@
+export * from './use-csrf-token';

packages/shared/src/hooks/use-csrf-token.ts

@@ -0,0 +1,17 @@
+/**
+ * Get the CSRF token from the meta tag.
+ * @returns The CSRF token.
+ */
+export function useCsrfToken() {
+  if (typeof document === 'undefined') {
+    return '';
+  }
+
+  const meta = document.querySelector('meta[name="csrf-token"]');
+
+  if (!meta) {
+    return '';
+  }
+
+  return meta.getAttribute('content') ?? '';
+}