feat: add Web Hosting configuration landing page in all locales (#285)

* feat: add Web Hosting configuration landing page in all locales

* docs: cross-link automated emails guide in Web Hosting Configuration landing

* docs: proofreading web hosting configuration landing page

- harmonise the first orientation question across all 7 locales: three
  distinct verbs, "associate" verb for domain names (fr: déclarer→associer,
  paramétrer; es/it/pl/pt: distinct verb for the environment)
- fix IT email spelling (e-mail→email) in the automated-emails item
- bump lastUpdated to 2026-06-25

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Co-authored-by: Benoit Chuchla <benoit.chuchla@ovhcloud.com>