feat: add insturctions on how to dump keys for v10

src/components/DownloadBase64.tsx

@@ -0,0 +1,32 @@
+import type { ReactNode } from 'react';
+import { ExtLink } from './ExtLink';
+import { IoMdArchive } from 'react-icons/io';
+
+export type DownloadBase64Props = {
+  data: string;
+  filename: string;
+  mimetype?: string;
+  className?: string;
+  icon?: boolean | ReactNode;
+  children?: ReactNode;
+};
+
+export function DownloadBase64({
+  className,
+  children,
+  data,
+  filename,
+  icon,
+  mimetype = 'application/octet-stream',
+}: DownloadBase64Props) {
+  return (
+    <ExtLink
+      icon={icon ?? <IoMdArchive className="inline size-sm ml-1" />}
+      className={className ?? 'link-info mx-1'}
+      download={filename}
+      href={`data:${mimetype};base64,${data}`}
+    >
+      {children ?? <code>{filename}</code>}
+    </ExtLink>
+  );
+}