feat(auth): implement multi-step authentication flow

This commit introduces a complete user authentication system, replacing the previous placeholder login page. The new flow includes signup, login, and OTP verification, all integrated with backend webhooks.

- Adds `AuthPage` to manage the view state between login, signup, and OTP forms.
- Implements `LoginForm` with support for both email and WhatsApp credentials.
- Implements `SignupForm` with password strength and confirmation validation.
- Adds `OtpForm` for two-factor verification after a successful signup.
- Integrates `axios` for making API calls to the backend webhooks.
- Updates styling with a new background, custom brand colors, and the Poppins font.

BREAKING CHANGE: The `LoginPage` component has been deleted and is replaced by the new `AuthPage` component. Any imports of `LoginPage` must be updated.

adventure-rental-app/src/AuthPage.jsx

@@ -2,23 +2,31 @@ import React, { useState, useCallback } from 'react';
 import LoginForm from './LoginForm';
 import SignupForm from './SignupForm';
 import OtpForm from './OtpForm';
+import ForgotPasswordForm from './ForgotPasswordForm';
+import ResetPasswordForm from './ResetPasswordForm';
 
 const AuthPage = () => {
-  const [view, setView] = useState('login'); // 'login', 'signup', or 'otp'
+  const [view, setView] = useState('login'); // 'login', 'signup', 'otp', 'forgotPassword', 'resetPassword'
 
   const showSignup = useCallback(() => setView('signup'), []);
   const showLogin = useCallback(() => setView('login'), []);
   const showOtp = useCallback(() => setView('otp'), []);
+  const showForgotPassword = useCallback(() => setView('forgotPassword'), []);
+  const showResetPassword = useCallback(() => setView('resetPassword'), []);
 
   const renderForm = () => {
     switch (view) {
       case 'signup':
         return <SignupForm toggleForm={showLogin} onSuccess={showOtp} />;
       case 'otp':
-        return <OtpForm />;
+        return <OtpForm onSuccess={showLogin} />;
+      case 'forgotPassword':
+        return <ForgotPasswordForm showLogin={showLogin} showReset={showResetPassword} />;
+      case 'resetPassword':
+        return <ResetPasswordForm showLogin={showLogin} />;
       case 'login':
       default:
-        return <LoginForm toggleForm={showSignup} onSuccess={showLogin} />;
+        return <LoginForm toggleForm={showSignup} showForgotPassword={showForgotPassword} />;
     }
   };