feat: enable async marked parsing and improve markdown rendering

- Configure marked with async, breaks, and GFM options
- Update markdown processing to use textContent and async marked.parse
- Replace synchronous innerHTML parsing with awaited async parsing

EnvelopeGenerator.Web/wwwroot/js/markdown.js

@@ -1 +1,11 @@
-document.querySelectorAll('.markdown').forEach(e => e.innerHTML = marked.parse(e.innerHTML));
+marked.use({
+    async: true,
+    breaks: true,
+    gfm: true,
+});
+
+(
+    document.querySelectorAll('.markdown').forEach(async el => {
+        el.innerHTML = await marked.parse(el.textContent);
+    })
+)()

EnvelopeGenerator.Web/wwwroot/js/markdown.min.js

@@ -1 +1 @@
-document.querySelectorAll(".markdown").forEach(n=>n.innerHTML=marked.parse(n.innerHTML));
+marked.use({"async":!0,breaks:!0,gfm:!0});document.querySelectorAll(".markdown").forEach(async n=>{n.innerHTML=await marked.parse(n.textContent)})();