Initialisation

Added the packages and files for the backend server

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

@@ -0,0 +1,10 @@
+import type { ASTVisitor } from '../../language/visitor';
+import type { SDLValidationContext } from '../ValidationContext';
+/**
+ * Unique field definition names
+ *
+ * A GraphQL complex type is only valid if all its fields are uniquely named.
+ */
+export declare function UniqueFieldDefinitionNamesRule(
+  context: SDLValidationContext,
+): ASTVisitor;