[Cache] Document the different cache status behavior after a purge

[ngayerie]

PCX-9851

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Original Link	Updated Link
https://developers.cloudflare.com/cache/how-to/purge-cache/purge-by-hostname/	https://ngayerie-patch-5.cloudflare-docs-7ou.pages.dev/cache/how-to/purge-cache/purge-by-hostname/
https://developers.cloudflare.com/cache/how-to/purge-cache/purge_by_prefix/	https://ngayerie-patch-5.cloudflare-docs-7ou.pages.dev/cache/how-to/purge-cache/purge_by_prefix/
https://developers.cloudflare.com/cache/how-to/purge-cache/purge-by-tags/	https://ngayerie-patch-5.cloudflare-docs-7ou.pages.dev/cache/how-to/purge-cache/purge-by-tags/
https://developers.cloudflare.com/cache/how-to/purge-cache/purge-by-single-file/	https://ngayerie-patch-5.cloudflare-docs-7ou.pages.dev/cache/how-to/purge-cache/purge-by-single-file/
https://developers.cloudflare.com/cache/how-to/purge-cache/purge-everything/	https://ngayerie-patch-5.cloudflare-docs-7ou.pages.dev/cache/how-to/purge-cache/purge-everything/

[angelampcosta]

@ngayerie thank for opening the PR. I made a few suggestions. Let me know if they make sense.

[ngayerie]

Thanks @angelampcosta ! That's great!

[angelampcosta]

@ngayerie please don't merge. We need a final review from Zaidoon.