feat: support artifact preview

frontend/src/core/artifacts/loader.ts

@@ -0,0 +1,14 @@
+import { urlOfArtifact } from "./utils";
+
+export async function loadArtifactContent({
+  filepath,
+  threadId,
+}: {
+  filepath: string;
+  threadId: string;
+}) {
+  const url = urlOfArtifact({ filepath, threadId });
+  const response = await fetch(url);
+  const text = await response.text();
+  return text;
+}