Event page: Add syntax section, remove table

[Elchi3]

Summary

This PR demonstrates how an event page would look like if we add a syntax section, and remove the tabular information box.

Motivation

Better readability and usefulness of event pages.
Consistency with other reference page types.

I'm not yet sure if this is the best way to represent the information.
"Event type" seems quite analog to say "Return value" of method pages, so I believe making this its own heading is useful.

The syntax box is a first attempt, open to feedback to make it more useful.

"Cancelable" seems to be something that can be mentioned in the summary and doesn't necessarily need to stand on its own.

Thoughts?

[github-actions]

Preview URLs

• https://pr10431.content.dev.mdn.mozit.cloud/en-US/docs/Web/API/XRLightProbe/reflectionchange_event

Flaws

None! 🎉

External URLs

URL: /en-US/docs/Web/API/XRLightProbe/reflectionchange_event
Title: XRLightProbe: reflectionchange event
on GitHub

No new external URLs