Implement login/signup pages

This commit implements the login and signup pages for the application.

src/App.tsx

@@ -9,6 +9,9 @@ import Transactions from "./pages/Transactions";
 import Analytics from "./pages/Analytics";
 import Settings from "./pages/Settings";
 import NotFound from "./pages/NotFound";
+import Login from "./pages/Login";
+import Register from "./pages/Register";
+import ForgotPassword from "./pages/ForgotPassword";
 
 const queryClient = new QueryClient();
 
@@ -23,6 +26,9 @@ const App = () => (
           <Route path="/transactions" element={<Transactions />} />
           <Route path="/analytics" element={<Analytics />} />
           <Route path="/settings" element={<Settings />} />
+          <Route path="/login" element={<Login />} />
+          <Route path="/register" element={<Register />} />
+          <Route path="/forgot-password" element={<ForgotPassword />} />
           <Route path="*" element={<NotFound />} />
         </Routes>
       </BrowserRouter>