[Sync to prerelease] Add context and new example to redirects doc #1655
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Description
Sync of #1652 to
prerelease.Original PR
Add context and new example to redirects doc
Hello all, I was reading the redirects doc and felt some additional context could be added to help users better understand why they need to write their config the way they do. I also felt that it would be valuable to have an explicit example for each of the use cases mentioned in the doc, so I added an example for re-organizing directory hierarchy.