add codes

src/views/Options/About.js

@@ -0,0 +1,18 @@
+import Box from "@mui/material/Box";
+import CircularProgress from "@mui/material/CircularProgress";
+import ReactMarkdown from "react-markdown";
+import { useI18n, useI18nMd } from "../../hooks/I18n";
+
+export default function About() {
+  const i18n = useI18n();
+  const [md, loading, error] = useI18nMd("about_md");
+  return (
+    <Box>
+      {loading ? (
+        <CircularProgress />
+      ) : (
+        <ReactMarkdown children={error ? i18n("about_md_local") : md} />
+      )}
+    </Box>
+  );
+}