feat[dev]: add key-value template #3393

Description

This task describes the code implementation for: #3032

Implement the key-value template in Storybook according to the Figma hand-off of the design subtask.

Open Questions towards design

• Responsive behavior (stacked vs. side by side on mobile)?
• Alignment of values (e.g. right-aligned numbers/currencies)?

DoR

• Item has been estimated by the team
• Item dependencies have been identified and documented