Add PrestaShop 9.2.0 release article

[marsaldev]

Questions	Answers
Description?	Adds the PrestaShop 9.2.0 stable release announcement for the Build Blog: the headline features (One Page Checkout, Extra Properties, Ask AI, Klaviyo, Symfony migration), a "What's more in the core?" section for the Key feature PR, the Hummingbird 2.1.2 section, the changelog, the contributors grid, and the 9.2 banner assets under static/assets/images/2026/09/.
Fixed ticket?	n/a

Notes for review

• Publication date is set to 2026-09-30.
• Changelog is split into three accordions like the 9.1.0 article:
  • v9.2.0 (5 PRs), open by default, taken from the official docs/CHANGELOG.txt entry added in PrestaShop/PrestaShop#43022.
  • v9.2.0 RC1 (93 PRs) and v9.2.0 Beta 1 (357 PRs), collapsed, copied from the published RC1 and Beta articles.
• What's more in the core? covers thumbnail fitment (PrestaShop/PrestaShop#41977, the only merged PR labelled Key feature in the 9.2.0 milestone), crediting the sponsor listed in the PR.
• Hummingbird section is based on the v2.1.1 release notes, with v2.1.2 as the version embedded in 9.2.0.
• Download CTA points to https://prestashop.com/versions/.
• Update section only says that the Update Assistant version supporting 9.2 is still in development; the article will be updated with upgrade instructions once it is released.
• Contributors grid lists the 52 contributors of the Beta, RC1 and final stages (bots excluded). New contributors welcomed: @nabhan06 and @samilmarekrygula.
• The "See the full release notes" CTA links to the 9.2.0 tag, which will resolve once the release is tagged.
• 767x212_9.2.png is included with the other banner variants but is not referenced by the article.

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