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>

lib/Support/Search/SearchQueryNormalizer.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace MintyPHP\Support\Search;
+
+class SearchQueryNormalizer
+{
+    public static function normalizeLikeQuery(string $query): string
+    {
+        $query = trim($query);
+        if ($query === '') {
+            return '';
+        }
+
+        $query = str_replace('\\', '\\\\', $query);
+        $query = str_replace('_', '\\_', $query);
+        $query = str_replace('*', '%', $query);
+
+        if (!str_starts_with($query, '%')) {
+            $query = '%' . $query;
+        }
+        if (!str_ends_with($query, '%')) {
+            $query .= '%';
+        }
+
+        return $query;
+    }
+
+    public static function normalizeScoreQuery(string $query): string
+    {
+        $query = trim($query);
+        if ($query === '') {
+            return '';
+        }
+
+        return str_replace(['*', '%', '_'], '', $query);
+    }
+}