added backend-mgmt for dataset/dataset_entry and utterances, this includes upload and also displaying of the dataset on the admin pages

next.config.ts

@@ -2,6 +2,11 @@ import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
   /* config options here */
+  experimental: {
+    serverActions: {
+      bodySizeLimit: '10000mb'
+    }
+  },
 };
 
 export default nextConfig;