Initialisation

Added the packages and files for the backend server

node_modules/graphql/validation/rules/NoUnusedVariablesRule.d.ts

@@ -0,0 +1,13 @@
+import type { ASTVisitor } from '../../language/visitor';
+import type { ValidationContext } from '../ValidationContext';
+/**
+ * No unused variables
+ *
+ * A GraphQL operation is only valid if all variables defined by an operation
+ * are used, either directly or within a spread fragment.
+ *
+ * See https://spec.graphql.org/draft/#sec-All-Variables-Used
+ */
+export declare function NoUnusedVariablesRule(
+  context: ValidationContext,
+): ASTVisitor;