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/Classes/DataProcessing/ContainerChildrenProcessor.php

@@ -8,6 +8,7 @@ use Evomedien\Vitec\UserFunc\ProductShowJsonRenderer;
 use Evomedien\Vitec\UserFunc\UsecaseListJsonRenderer;
 use Evomedien\Vitec\UserFunc\UsecaseShowJsonRenderer;
 use Evomedien\Vitec\UserFunc\MarketListJsonRenderer;
+use Evomedien\Vitec\UserFunc\SolutionListJsonRenderer;
 use Evomedien\Vitec\UserFunc\MarketShowJsonRenderer;
 use Evomedien\Vitec\UserFunc\SolutionShowJsonRenderer;
 use Evomedien\Vitec\UserFunc\DownloadcardJsonRenderer;
@@ -119,6 +120,7 @@ final class ContainerChildrenProcessor implements DataProcessorInterface
         'vitec_usecaseshow'  => [UsecaseShowJsonRenderer::class, 'usecase'],
         'vitec_marketshow'   => [MarketShowJsonRenderer::class, 'market'],
         'vitec_marketlist'   => [MarketListJsonRenderer::class, 'markets'],
+        'vitec_solutionlist' => [SolutionListJsonRenderer::class, 'solutions'],
         'vitec_solutionshow' => [SolutionShowJsonRenderer::class, 'solution'],
         'vitec_downloadcard' => [DownloadcardJsonRenderer::class, 'downloadcard'],
         'vitec_downloadcardcollection' => [DownloadcardcollectionJsonRenderer::class, 'downloadcardcollection'],