feat: Add user registration component and authentication services

- Implemented Register component for user sign-up with form validation and network status handling.
- Created authAPI service for handling user login and registration with online/offline support.
- Developed localStorage service for managing user data and sessions offline.
- Introduced networkService for detecting online/offline status and managing connectivity.
- Defined authentication types for requests and responses.
- Added TypeScript configuration for the project.

__tests__/App.test.tsx

@@ -0,0 +1,13 @@
+/**
+ * @format
+ */
+
+import React from 'react';
+import ReactTestRenderer from 'react-test-renderer';
+import App from '../App';
+
+test('renders correctly', async () => {
+  await ReactTestRenderer.act(() => {
+    ReactTestRenderer.create(<App />);
+  });
+});