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>

packages/vitec/Configuration/Sets/Vitecset/setup.typoscript

@@ -160,6 +160,42 @@ tt_content {
             }
         }
     }
+
+    vitec_modelcard < lib.contentElementWithHeader
+    vitec_modelcard {
+        fields {
+            content {
+                fields {
+                    card = USER
+                    card.userFunc = Evomedien\Vitec\UserFunc\ModelcardJsonRenderer->render
+                }
+            }
+        }
+    }
+
+    vitec_customerlogos < lib.contentElementWithHeader
+    vitec_customerlogos {
+        fields {
+            content {
+                fields {
+                    customerlogos = USER
+                    customerlogos.userFunc = Evomedien\Vitec\UserFunc\CustomerlogosJsonRenderer->render
+                }
+            }
+        }
+    }
+
+    vitec_locationlist < lib.contentElementWithHeader
+    vitec_locationlist {
+        fields {
+            content {
+                fields {
+                    locations = USER
+                    locations.userFunc = Evomedien\Vitec\UserFunc\LocationsJsonRenderer->render
+                }
+            }
+        }
+    }
 }
 
 # Include container (layout) rendering definitions