Success-story migration + new plugins + JSON/UX polish

- Success Stories: full migration from old site (48/48, audited),
  markets n:n, quotation content block, columns content block,
  pretty SEO detail URLs via SuccessStoryPathRewrite middleware,
  list/detail split (list page 4 / story page), detailUrl/backUrl
- New plugins: VITEC Locations (grid/list/map + RTE map text),
  VITEC Customer Logos (color/bw logic, only-show-selected),
  VITEC Card (one plugin for product/story/market/solution
  with reloading FlexForm + custom backend preview renderer)
- Eventlist: layout dropdown (list/grid/teaserbar) in settings
- Hero section CB: Images/Video tabs, background video + overlay
- Product JSON: full category rootline (parents), fixed missing
  ConnectionPool import (all-products crash), category tree map
- Backend preview CSS: container-query responsive (narrow columns)
- Docs: ISO architecture spec, root + extension READMEs

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

config/sites/vitec/config.yaml

@@ -69,4 +69,26 @@ routeEnhancers:
     aspects:
       news-title:
         type: NewsTitle
+  UsecaseDetail:
+    type: Extbase
+    limitToPages:
+      - 4
+      - 26
+      - 25
+    extension: Vitec
+    plugin: Usecaseshow
+    routes:
+      -
+        routePath: '/{usecase_slug}'
+        _controller: 'Usecase::show'
+        _arguments:
+          usecase_slug: usecase
+    defaultController: 'Usecase::show'
+    requirements:
+      usecase_slug: '[a-zA-Z0-9\-]+'
+    aspects:
+      usecase_slug:
+        type: PersistedAliasMapper
+        tableName: tx_vitec_domain_model_usecase
+        routeFieldName: slug
 websiteTitle: ''