Expand Privacy Design Strategies in xCOMPASS

**Description**
We are looking for contributors to help expand the privacy design strategies covered in xCOMPASS. This includes adding new strategies, examples, and guidance to help developers apply privacy principles more effectively.

**Problem Overview**
xCOMPASS currently provides limited coverage of privacy design strategies. A deeper dive into these strategies will help developers better understand and implement privacy-by-design principles.

**Contribution Scope / Expectations**

- Add new privacy design strategies (e.g., data minimization, separation, aggregation).
- Provide examples and implementation guidance.
- Link strategies to relevant questions in the framework.

**Impact**

- Enhances the educational and practical value of xCOMPASS.
- Supports broader adoption and real-world application.