Add Pectra countdown and API integration to the dashboards page

the[ dashboard page](https://ethereum.org/en/resources/) was realised as a PoC, and we have planned a series of improvements.

This one is to add the Upgrade to the scaling section.

here is  the figma > https://www.figma.com/design/hjuimvUsUMgpIL7Nr41evG/Dashboard?node-id=794-116189&t=muMYtca9n1lGnNgm-1

![Image](https://github.com/user-attachments/assets/fe89fe8c-c01f-4752-9576-8a4765d96aac)