Add Summary of Discounts in the Summary Section

[LordEaster]

Description:
In the Summary section, display the total amount saved from discounts applied at both individual and group levels. This will help users see their savings at a glance.

Tasks:

1. Add a new section in the Summary component to show the total discount applied, broken down by individual order discounts and group discounts.
2. Calculate total savings by summing discounts at both levels and display this in a clear and concise format.
3. Update the layout to ensure the discount summary fits well with other elements in the Summary section.

Expected Outcome:
The Summary section displays the total savings from discounts, allowing users to quickly view the amount saved.