pubsub: remove docs

[elithrar]

Remove the Pub/Sub docs: private beta was shut down Aug 20th 2025.

[github-actions]

Preview URL: https://224904ac.preview.developers.cloudflare.com
Preview Branch URL: https://remove-pubsub.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/pub-sub/guide/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/guide/
https://developers.cloudflare.com/pub-sub/learning/integrate-workers/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/learning/integrate-workers/
https://developers.cloudflare.com/pub-sub/learning/command-line-wrangler/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/learning/command-line-wrangler/
https://developers.cloudflare.com/pub-sub/platform/authentication-authorization/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/platform/authentication-authorization/
https://developers.cloudflare.com/pub-sub/examples/connect-javascript/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/examples/connect-javascript/
https://developers.cloudflare.com/pub-sub/examples/connect-python/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/examples/connect-python/
https://developers.cloudflare.com/pub-sub/examples/connect-rust/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/examples/connect-rust/
https://developers.cloudflare.com/pub-sub/learning/websockets-browsers/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/learning/websockets-browsers/
https://developers.cloudflare.com/pub-sub/learning/how-pubsub-works/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/learning/how-pubsub-works/
https://developers.cloudflare.com/pub-sub/platform/mqtt-compatibility/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/platform/mqtt-compatibility/
https://developers.cloudflare.com/pub-sub/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/
https://developers.cloudflare.com/pub-sub/platform/limits/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/platform/limits/
https://developers.cloudflare.com/pub-sub/learning/client-libraries/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/learning/client-libraries/
https://developers.cloudflare.com/pub-sub/learning/delivery-guarantees/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/learning/delivery-guarantees/
https://developers.cloudflare.com/pub-sub/faq/	https://remove-pubsub.preview.developers.cloudflare.com/pub-sub/faq/

[pedrosousa]

We should redirect /pub-sub/* to the Dev Docs home page.