Adding the project for code injection and XSS vulnerability testing

This project is designed to help developers understand and mitigate code injection and XSS vulnerabilities. It includes a backend API and a frontend interface for testing various attack vectors in a controlled environment.

frontend/src/interfaces/auth.ts

@@ -0,0 +1,10 @@
+export interface LoginRequest {
+  username: string;
+  password: string;
+}
+
+export interface LoginResponse {
+  success: boolean;
+  message?: string;
+  token?: string;
+}