Unify list plugins, add solution list and per-story detail page

- vitec_usecaselist: layout + record selection like marketlist
- new plugin vitec_solutionlist (spec 7.13.3, key "solutions")
- tx_vitec_domain_model_usecase: detail_page -> resolved detailUrl
  (also gives story cards in vitec_modelcard a link for the first time)
- "Show Toolbar" checkbox on product/market/solution/usecase lists
- spec bumped to v1.9

BREAKING: vitec_productlist and vitec_usecaselist now emit an object
instead of a bare array. Consumers must read products.products and
usecases.usecases. Also found: productlist had a configurable layout
that was never serialised; it is emitted now, but keeps its own 0-3
vocabulary instead of grid/list/carousel.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

packages/vitec/ext_localconf.php

@@ -104,6 +104,17 @@ $GLOBALS['TYPO3_CONF_VARS']['SYS']['formEngine']['nodeRegistry'][1750000000] = [
         ]
     );
 
+    ExtensionUtility::configurePlugin(
+        'Vitec',
+        'Solutionlist',
+        [
+            \Evomedien\Vitec\Controller\SolutionController::class => 'list'
+        ],
+        [
+            \Evomedien\Vitec\Controller\SolutionController::class => 'list'
+        ]
+    );
+
     ExtensionUtility::configurePlugin(
         'Vitec',
         'Solutionshow',