Initialisation

Added the packages and files for the backend server

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

@@ -0,0 +1,16 @@
+import type { ASTVisitor } from '../../language/visitor';
+import type {
+  SDLValidationContext,
+  ValidationContext,
+} from '../ValidationContext';
+/**
+ * Unique directive names per location
+ *
+ * A GraphQL document is only valid if all non-repeatable directives at
+ * a given location are uniquely named.
+ *
+ * See https://spec.graphql.org/draft/#sec-Directives-Are-Unique-Per-Location
+ */
+export declare function UniqueDirectivesPerLocationRule(
+  context: ValidationContext | SDLValidationContext,
+): ASTVisitor;