Initialisation

Added the packages and files for the backend server

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

@@ -0,0 +1,13 @@
+import type { ASTVisitor } from '../../language/visitor';
+import type { ASTValidationContext } from '../ValidationContext';
+/**
+ * Unique input field names
+ *
+ * A GraphQL input object value is only valid if all supplied fields are
+ * uniquely named.
+ *
+ * See https://spec.graphql.org/draft/#sec-Input-Object-Field-Uniqueness
+ */
+export declare function UniqueInputFieldNamesRule(
+  context: ASTValidationContext,
+): ASTVisitor;