Consider adding Astro ViewTransitions for smoother page transitions

[Sillyvan]

Example URL(s)

https://developers.cloudflare.com/

Actual Behavior

Starlights dosent use ViewTransitions by default so every page change will have a loading spinner and the page flashes.

Expected Behavior

Using the View Transitions API you could make these transitions smooth being a tiny bit nicer on the eye.

Additional information

Some people were reporting their annoyance with the page flashing. They also referred to it as feeling slower. So i think this might fixes the issue. Unsupported browsers will just see the page as it is now.

https://docs.astro.build/en/guides/view-transitions/

I tested it locally and adding <ViewTransitions /> to the Head.astro file already did the job.

[KianNH]

Hey there, thanks for making this issue and already testing it!

Unfortunately, whilst at first glance a simple <ViewTransitions /> appears to be all it takes, there are some subtle breakages across Starlight currently: withastro/starlight#694 (comment)

We tested it shortly after migrating and had a handful of those issues pop-up, so we're likely to wait until we can dedicate more time to making it work 100% with Starlight.