Add Krust Kubernetes dashboard

[vanchonlee]

0. I have read the Contribution Guidelines
1. I confirm that I have read and understood the sections about "AI"-adjacent software
2. Project URL: https://krust.io/
3. Why should this project be added: Krust is a native macOS Kubernetes dashboard for developers and DevOps engineers who manage Kubernetes clusters from a Mac. It is not an Electron app, and the list already includes developer-focused native macOS tools.
4. End all descriptions with a full stop/period
5. Entry is ordered alphabetically
6. Appropriate icon(s) added if applicable (OSS, freeware)

Notes:

• I did not add OSS or Freeware icons because Krust is not fully open-source/freeware.
• The entry avoids AI-focused wording; Krust is listed here as a native Kubernetes dashboard/developer tool.