CI/CD is a crowded space. We need a clear, short pitch explaining why someone would use Tekton specifically.

This is needed both for the KubeCon kiosk and for general marketing/outreach going forward.

Acceptance Criteria

* Short (2-3 sentence) elevator pitch for Tekton
* Focus on use cases where Tekton shines rather than "we're better than X"
* Usable by kiosk staff, website, and marketing materials