add composer-unused, comprehensive docs, and project restructure

- Add icanhazstring/composer-unused as dev dependency for dependency hygiene checks
- Add German documentation (docs/) covering architecture, conventions, workflows, and developer checklists
- Add API layer (ApiAuth, ApiBootstrap, ApiResponse), audit, scheduler, custom fields, and SSO services
- Add Microsoft OIDC SSO, API token management, and user lifecycle features
- Add swagger-ui vendor integration and OpenAPI spec
- Add production Docker setup and bin/ scripts
- Update composer dependencies, config, templates, and frontend assets throughout

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pages/search/data().php

@@ -80,9 +80,19 @@ foreach ($resources as $resource) {
     }
 }
 
+$items = array_merge($items, SearchConfig::hotkeyResultItems($query));
+if (PermissionService::userHas($userId, PermissionService::DOCS_VIEW)) {
+    $items = array_merge($items, SearchConfig::docsResultItems($query));
+}
+
 $scoreQuery = SearchConfig::normalizeScoreQuery($query);
 $queryLower = mb_strtolower($scoreQuery);
 $scoreItem = static function (array $item) use ($queryLower): int {
+    $manualScore = (int) ($item['search_score'] ?? 0);
+    if ($manualScore > 0) {
+        return $manualScore;
+    }
+
     $title = mb_strtolower((string) ($item['title'] ?? ''));
     $description = mb_strtolower((string) ($item['description'] ?? ''));
     if ($title === $queryLower) {