Add new settings and cache repository files, update admin settings controller and templates

- Introduced new `SettingsRepository` and `CacheRepository` classes in the `autoload\Domain` namespace.
- Updated `SettingsController` in the `admin\Controllers` namespace to enhance settings management.
- Added new templates for settings in `admin\templates\settings` and `admin\templates\site`.
- Improved overall structure and organization of settings-related files.

tests/Unit/Domain/Product/ProductRepositoryTest.php

@@ -115,6 +115,132 @@ class ProductRepositoryTest extends TestCase
         $this->assertTrue($result);
     }
 
+    /**
+     * Test pobierania ceny - zwraca cenę regularną gdy brak promocji
+     */
+    public function testGetPriceReturnsRegularPrice()
+    {
+        // Arrange
+        $mockDb = $this->createMock(\medoo::class);
+        $mockDb->method('get')->willReturn([
+            'price_brutto' => '99.99',
+            'price_brutto_promo' => ''
+        ]);
+
+        $repository = new ProductRepository($mockDb);
+
+        // Act
+        $price = $repository->getPrice(123);
+
+        // Assert
+        $this->assertEquals(99.99, $price);
+        $this->assertIsFloat($price);
+    }
+
+    /**
+     * Test pobierania ceny - zwraca cenę promocyjną gdy jest niższa
+     */
+    public function testGetPriceReturnsPromoPrice()
+    {
+        // Arrange
+        $mockDb = $this->createMock(\medoo::class);
+        $mockDb->method('get')->willReturn([
+            'price_brutto' => '99.99',
+            'price_brutto_promo' => '79.99'
+        ]);
+
+        $repository = new ProductRepository($mockDb);
+
+        // Act
+        $price = $repository->getPrice(123);
+
+        // Assert
+        $this->assertEquals(79.99, $price);
+    }
+
+    /**
+     * Test pobierania ceny - zwraca regularną gdy promo jest wyższa
+     */
+    public function testGetPriceReturnsRegularWhenPromoIsHigher()
+    {
+        // Arrange
+        $mockDb = $this->createMock(\medoo::class);
+        $mockDb->method('get')->willReturn([
+            'price_brutto' => '49.99',
+            'price_brutto_promo' => '79.99'
+        ]);
+
+        $repository = new ProductRepository($mockDb);
+
+        // Act
+        $price = $repository->getPrice(123);
+
+        // Assert
+        $this->assertEquals(49.99, $price);
+    }
+
+    /**
+     * Test pobierania ceny - zwraca null gdy produkt nie istnieje
+     */
+    public function testGetPriceReturnsNullWhenNotFound()
+    {
+        // Arrange
+        $mockDb = $this->createMock(\medoo::class);
+        $mockDb->method('get')->willReturn(false);
+
+        $repository = new ProductRepository($mockDb);
+
+        // Act
+        $price = $repository->getPrice(999);
+
+        // Assert
+        $this->assertNull($price);
+    }
+
+    /**
+     * Test pobierania nazwy produktu - zwraca nazwę
+     */
+    public function testGetNameReturnsProductName()
+    {
+        // Arrange
+        $mockDb = $this->createMock(\medoo::class);
+        $mockDb->expects($this->once())
+            ->method('get')
+            ->with(
+                $this->equalTo('pp_shop_products_langs'),
+                $this->equalTo('name'),
+                $this->equalTo(['AND' => ['product_id' => 123, 'lang_id' => 'pl']])
+            )
+            ->willReturn('Testowy produkt');
+
+        $repository = new ProductRepository($mockDb);
+
+        // Act
+        $name = $repository->getName(123, 'pl');
+
+        // Assert
+        $this->assertEquals('Testowy produkt', $name);
+        $this->assertIsString($name);
+    }
+
+    /**
+     * Test pobierania nazwy - produkt nie istnieje
+     */
+    public function testGetNameReturnsNullWhenNotFound()
+    {
+        // Arrange
+        $mockDb = $this->createMock(\medoo::class);
+        $mockDb->method('get')->willReturn(false);
+
+        $repository = new ProductRepository($mockDb);
+
+        // Act
+        $name = $repository->getName(999, 'pl');
+
+        // Assert
+        $this->assertNull($name);
+    }
+
     /**
      * Test typu zwracanej wartości
      */