ver. 0.282: Banners frontend migration, Cache cleanup, Shared\Cache namespace

- Banners frontend: front\Views\Banners (new), BannerRepository +2 frontend methods,
  front\view\Site przepięty, usunięte front\factory\Banners i front\view\Banners
- Cache cleanup: eliminacja legacy class.Cache.php (file-based cache),
  13 metod front\factory przepiętych z \Cache::fetch/store na CacheHandler
- Shared\Cache namespace: CacheHandler i RedisConnection przeniesione do Shared\Cache\,
  60 odwołań CacheHandler i 12 odwołań RedisConnection przepiętych,
  usunięte backward-compat wrappery class.CacheHandler.php i class.RedisConnection.php
- Naprawione rozbieżności kluczy cache (random_products, category_name)

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

autoload/Domain/Languages/LanguagesRepository.php

@@ -337,7 +337,7 @@ class LanguagesRepository
      */
     public function defaultLanguage(): string
     {
-        $cacheHandler = new \CacheHandler();
+        $cacheHandler = new \Shared\Cache\CacheHandler();
         $cacheKey = 'Domain\Languages\LanguagesRepository::defaultLanguage';
 
         $objectData = $cacheHandler->get($cacheKey);
@@ -361,7 +361,7 @@ class LanguagesRepository
      */
     public function activeLanguages(): array
     {
-        $cacheHandler = new \CacheHandler();
+        $cacheHandler = new \Shared\Cache\CacheHandler();
         $cacheKey = 'Domain\Languages\LanguagesRepository::activeLanguages';
 
         $objectData = $cacheHandler->get($cacheKey);
@@ -389,7 +389,7 @@ class LanguagesRepository
      */
     public function translations(string $language = 'pl'): array
     {
-        $cacheHandler = new \CacheHandler();
+        $cacheHandler = new \Shared\Cache\CacheHandler();
         $cacheKey = "Domain\Languages\LanguagesRepository::translations:$language";
 
         $objectData = $cacheHandler->get($cacheKey);