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/shop/class.Product.php

@@ -126,7 +126,7 @@ class Product implements \ArrayAccess
       try
       {
         // Get the Redis connection instance
-        $redis = \RedisConnection::getInstance()->getConnection();
+        $redis = \Shared\Cache\RedisConnection::getInstance()->getConnection();
 
         // Check if Redis connection is valid
         if ( $redis )
@@ -303,7 +303,7 @@ class Product implements \ArrayAccess
   {
     global $mdb;
 
-    $cacheHandler = new \CacheHandler();
+    $cacheHandler = new \Shared\Cache\CacheHandler();
     $cacheKey = "\shop\Product::product_sets_when_add_to_basket:$product_id";
 
     $objectData = $cacheHandler -> get( $cacheKey );
@@ -536,7 +536,7 @@ class Product implements \ArrayAccess
   {
     global $mdb, $settings;
 
-    $cacheHandler = new \CacheHandler();
+    $cacheHandler = new \Shared\Cache\CacheHandler();
     $cacheKey = "\shop\Product::get_product_permutation_quantity_options:v2:$product_id:$permutation";
 
     $objectData = $cacheHandler -> get( $cacheKey );