- Add `CheckoutDataStepComponent` for handling user data input with reactive forms.
- Create `CheckoutPaymentStepComponent` for managing payment method selection and display.
- Refactor `CheckoutPageComponent` to utilize the new components, improving modularity and readability.
- Introduce SCSS styles for both new components, ensuring consistent design with existing styles.
- Update HTML structure in `checkout-page.component.html` to integrate the new components.
- Define models for checkout forms and payment methods in `checkout-page.models.ts`.