US-22 Categorize exhibitions

User story

As a visitor, I want to filter the exhibitions by type, theme, or location, so that I can focus on the ones fulfilling that criteria.

Prerequisites

• Exhibition overview page exists.

Acceptance criteria

• Exhibitions can be categorized.
• Exhibitions can be sorted by categories.

Sprint Ready Checklist

1. Acceptance criteria defined
2. Team understands acceptance criteria
3. Team has defined solution / steps to satisfy acceptance criteria
4. Acceptance criteria is verifiable / testable
5. External / 3rd Party dependencies identified