Update blueprints for multilingual support

- Extract investigations field to separate file for reusability
- Fix investigations query to work with multilingual pages
- Use site.find() instead of page() for multilingual compatibility

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

site/blueprints/fields/investigations.yml

@@ -0,0 +1,9 @@
+label: Enquêtes
+type: pages
+parent: page('enquetes')
+layout: cards
+text: "{{ page.title }}, {{ page.subtitle }}"
+info: "{{ page.incidentConsequences }} à {{ page.incidentLocation }}"
+image:
+  cover: true
+  ratio: 16/9

site/blueprints/pages/investigations.yml

@@ -4,14 +4,4 @@ tabs:
   contentTab:
     label: Contenu
     sections:
-      investigations:
-        type: pages
-        text: "{{ page.title }}, {{ page.subtitle }}"
-        info: "{{ page.incidentConsequences }} à {{ page.incidentLocation }}"
-        layout: cards
-        size: huge
-        search: true
-        image:
-          cover: true
-          ratio: 12/7
-        template: investigation-summary
+      investigations: fields/investigations

site/blueprints/site.yml

@@ -1,5 +1,7 @@
 title: Site
 
-sections:
-  pages:
-    type: pages
+tabs:
+  contentTab:
+    label: Contenu
+    sections:
+      investigations: fields/investigations