📝 Sync v3 docs and content across all nine languages

New shortcode sections, landing layout docs, agent skill sections,
v2→v3 upgrade instructions, translated homepages, and sample
article feature images.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

exampleSite/content/docs/partials/index.de.md

@@ -1,5 +1,6 @@
 ---
 title: "Partials"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "Alle verfügbaren Partials in Blowfish."

exampleSite/content/docs/partials/index.es.md

@@ -1,5 +1,6 @@
 ---
 title: "Partials"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "Todos los partials disponibles en Blowfish."

exampleSite/content/docs/partials/index.fr.md

@@ -1,5 +1,6 @@
 ---
 title: "Partials"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "Tous les partials disponibles dans Blowfish."

exampleSite/content/docs/partials/index.it.md

@@ -1,5 +1,6 @@
 ---
 title: "Partials"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "All the partials available in Blowfish."

exampleSite/content/docs/partials/index.ja.md

@@ -1,5 +1,6 @@
 ---
 title: "パーシャル"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "Blowfish で利用可能なすべてのパーシャル。"

exampleSite/content/docs/partials/index.pt-br.md

@@ -1,5 +1,6 @@
 ---
 title: "Partials"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "Todos os partials disponíveis no Blowfish."

exampleSite/content/docs/partials/index.pt-pt.md

@@ -1,5 +1,6 @@
 ---
 title: "Partials"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "Todos os partials disponíveis no Blowfish."

exampleSite/content/docs/partials/index.zh-cn.md

@@ -1,5 +1,6 @@
 ---
 title: "局部模板(Partials)"
+featureimage: "images/v3/partials.png"
 weight: 9
 draft: false
 description: "所有 Blowfish 可以配置的 Partials"