augment @eslint/core SettingsConfig with react settings shape

Author: ljharb

types/eslint-core-augment.d.ts

@@ -0,0 +1,13 @@
+import '@eslint/core';
+
+declare module '@eslint/core' {
+  interface SettingsConfig {
+    react?: {
+      pragma?: string;
+      fragment?: string;
+      createClass?: string;
+    };
+  }
+}
+
+export {};