Add halt tree, and copy message id features (#1088)

website/src/pages/api/admin/stop_tree/[id].ts

@@ -0,0 +1,15 @@
+import { withRole } from "src/lib/auth";
+import { createApiClient } from "src/lib/oasst_client_factory";
+
+const handler = withRole("admin", async (req, res, token) => {
+  const { id } = req.query;
+  try {
+    const client = await createApiClient(token);
+    await client.stop_tree(id as string);
+    res.status(200).json({ message: `Tree ${id} stopped`, id });
+  } catch (e) {
+    res.status(500).json(e);
+  }
+});
+
+export default handler;