Support View Transitions in Claro

View transitions are now supported in Chromium and will someday be supported in other supported browsers.

I suggest that we use progressive enhancement to implement a basic version of this (the fade) within Claro.

More information:

• https://developer.mozilla.org/en-US/docs/Web/API/View_Transitions_API
• https://daverupert.com/2023/05/getting-started-view-transitions/