event: Listing page

Implement the Events Listing Page.

The Event Hexagon component is already implemented at `src/routes/(app)/events/_components/event-hexagon.svelte`

<img width="600" alt="Image" src="https://github.com/user-attachments/assets/d5408b95-dbb4-4566-a964-f0367b48b4ae" />

<img width="390" height="1082" alt="Image" src="https://github.com/user-attachments/assets/7ed4f994-6ed5-46c2-8749-03e0079594a9" />