Initialisation

Added the packages and files for the backend server

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

@@ -0,0 +1,13 @@
+import type { ASTVisitor } from '../../language/visitor';
+import type { ValidationContext } from '../ValidationContext';
+/**
+ * No undefined variables
+ *
+ * A GraphQL operation is only valid if all variables encountered, both directly
+ * and via fragment spreads, are defined by that operation.
+ *
+ * See https://spec.graphql.org/draft/#sec-All-Variable-Uses-Defined
+ */
+export declare function NoUndefinedVariablesRule(
+  context: ValidationContext,
+): ASTVisitor;