feat: use markdown-it instead of marked for descriptions

frontend/src/lib/api/markdown.ts

@@ -0,0 +1,11 @@
+import MarkdownIt from "markdown-it";
+import sanitize from "sanitize-html";
+
+const md = new MarkdownIt({
+  html: false,
+  breaks: true,
+}).disable(["heading", "link", "table"]);
+
+export default function renderMarkdown(src: string | null) {
+  return src ? sanitize(md.render(src)) : null;
+}