Re-think the current Serving structure

[ReToCode]

Context

See https://github.com/knative/docs/pull/5651/files#r1282636966

We should potentially improve our current ordering in the Serving section.

[Cali0707]

@ReToCode Eventing is also thinking about improving the current ordering. I've spoken to @mmejia02, and the UX WG is going to do user interviews to find out what structure makes the most sense (ideally it will be the same for Serving & Eventing)

/assign @knative/ux-wg-leads

[ReToCode]

Perfect, any feedback is welcome.

[github-actions]

This issue is stale because it has been open for 90 days with no
activity. It will automatically close after 30 more days of
inactivity. Reopen the issue with /reopen. Mark the issue as
fresh by adding the comment /remove-lifecycle stale.

[Cali0707]

/remove-lifecycle stale
/triage accepted

[mmejia02]

• Apply findings from the Eventing Documentation study to Serving study
• Think about conducting another study to the Serving Documentation