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

drizzle.config.ts

@@ -0,0 +1,9 @@
+import { defineConfig } from "drizzle-kit";
+
+export default defineConfig({
+  schema: "./src/lib/model/*",
+  dialect: "sqlite",
+  dbCredentials: {
+    url: "./sqlite_data.db"
+  }
+});