feat: add phone field to User model and update authentication flow

- Added phone field to User model in Prisma schema and generated types.
- Updated backend authentication to include phone as an additional field.
- Implemented phone input in the signup form with validation.
- Created a new SignupPage component for user registration.
- Updated routing to include signup path and redirect authenticated users.
- Modified login page to reference Playzer and added link to signup.

apps/frontend/src/features/login/login-page.tsx

@@ -91,7 +91,7 @@ export function LoginPage({ redirectTo = '/' }: LoginPageProps) {
       <section className="w-full max-w-sm rounded-xl border bg-card p-6 text-card-foreground shadow-sm">
         <h1 className="mb-2 text-2xl font-semibold">Iniciar sesión</h1>
         <p className="mb-4 text-sm text-muted-foreground">
-          Ingresá con tu cuenta para acceder a Home.
+          Ingresá con tu cuenta para acceder a Playzer.
         </p>
 
         <Button type="button" variant="outline" className="w-full" onClick={handleGoogleSignIn}>
@@ -161,6 +161,10 @@ export function LoginPage({ redirectTo = '/' }: LoginPageProps) {
           <Link to="/reset-password" className="text-primary hover:underline">
             ¿Olvidaste tu contraseña?
           </Link>
+          <span className="mx-3 text-muted-foreground">|</span>
+          <Link to="/signup" className="text-primary hover:underline">
+            Crear cuenta
+          </Link>
         </p>
       </section>
     </main>