DS Epic: Percentage Change

### **Description**

A Percentage Change component is a UI element that shows the rate of change in value of an asset or metric over a specified period, typically displayed as a percentage. It helps users quickly assess performance trends and market movements, often highlighted with visual cues like color coding for positive or negative changes.

The issue names no files, tests, or entry points. Begin by locating existing design-system components for similar metric or trend displays, then clarify the component's API, visual states, and supported time periods; done means a reviewed Percentage Change component that communicates positive and negative asset or metric changes.

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