fix(phpstan): improved method validity checks and reduced error handling

This commit fixes several issues in different PHP files.

• Added method_exists checks for isActive method in activate.php, deactivate.php and toggle.php to prevent calls to an undefined method.
• Similar check added for getTitle method in get.php.
• Fixed sorting functionality in search.php by using strcmp instead of greater than comparison.
• Removed a large number of ignored errors in phpstan-baseline.neon, indicating reduced error handling.
• Corrected the implode parameters order in Discount.php and typecasted variable to string before using explode in PriceFactor.php.
• Updated getTitle & toPriceFactor method parameters in Discount.php to use union types for compatibility with different data types.

Related: #18 (closed)

src/QUI/ERP/Discount/Discount.php

@@ -437,15 +437,23 @@ public function canUsedWith(QUI\ERP\Products\Interfaces\ProductInterface $Produc
     }
 
     /**
-     * @param OrderInterface $Order
+     * @param QUI\ERP\ErpEntityInterface $Order
      * @return bool
      */
-    public function canUsedInOrder(OrderInterface $Order): bool
+    public function canUsedInOrder(QUI\ERP\ErpEntityInterface $Order): bool
     {
         if ($this->isActive() === false) {
             return false;
         }
 
+        if (!interface_exists('QUI\ERP\Order\OrderInterface')) {
+            return false;
+        }
+
+        if (!($Order instanceof QUI\ERP\Order\OrderInterface)) {
+            return false;
+        }
+
         $Articles = $Order->getArticles();
 
         foreach ($Articles as $Article) {