[USER STORY]: Select Dream Product Quantity

[DebbieBergstrom]

Description:

As a Shopper, I want the option to select realDream product/experience package size and quantity so that I can avoid errors in my selection.

Acceptance Criteria:

• Dropdown menus for quantity selection.
• Ensure that the selected quantity are clearly displayed in the shopping cart.
• Error messages for invalid selections.

Tasks:

• [x] Implement dropdown options for quantities on product pages.
• [x] Validate selections with Django forms.
• [x] Display clear confirmation of selected quantity in the shopping cart.