Initialisation

Added the packages and files for the backend server

node_modules/graphql/utilities/concatAST.d.ts

@@ -0,0 +1,9 @@
+import type { DocumentNode } from '../language/ast';
+/**
+ * Provided a collection of ASTs, presumably each from different files,
+ * concatenate the ASTs together into batched AST, useful for validating many
+ * GraphQL source files which together represent one conceptual application.
+ */
+export declare function concatAST(
+  documents: ReadonlyArray<DocumentNode>,
+): DocumentNode;