Initialisation

Added the packages and files for the backend server

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

@@ -0,0 +1,12 @@
+import type { ASTVisitor } from '../../language/visitor';
+import type { ValidationContext } from '../ValidationContext';
+/**
+ * Possible fragment spread
+ *
+ * A fragment spread is only valid if the type condition could ever possibly
+ * be true: if there is a non-empty intersection of the possible parent types,
+ * and possible types which pass the type condition.
+ */
+export declare function PossibleFragmentSpreadsRule(
+  context: ValidationContext,
+): ASTVisitor;