Initialisation

Added the packages and files for the backend server

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

@@ -0,0 +1,14 @@
+import type { ASTVisitor } from '../../language/visitor';
+import type { ValidationContext } from '../ValidationContext';
+/**
+ * Overlapping fields can be merged
+ *
+ * A selection set is only valid if all fields (including spreading any
+ * fragments) either correspond to distinct response names or can be merged
+ * without ambiguity.
+ *
+ * See https://spec.graphql.org/draft/#sec-Field-Selection-Merging
+ */
+export declare function OverlappingFieldsCanBeMergedRule(
+  context: ValidationContext,
+): ASTVisitor;