Initialisation

Added the packages and files for the backend server

node_modules/graphql/execution/mapAsyncIterator.d.ts

@@ -0,0 +1,9 @@
+import type { PromiseOrValue } from '../jsutils/PromiseOrValue';
+/**
+ * Given an AsyncIterable and a callback function, return an AsyncIterator
+ * which produces values mapped via calling the callback function.
+ */
+export declare function mapAsyncIterator<T, U, R = undefined>(
+  iterable: AsyncGenerator<T, R, void> | AsyncIterable<T>,
+  callback: (value: T) => PromiseOrValue<U>,
+): AsyncGenerator<U, R, void>;