Add customer search method with filters and pagination to endpoint

- Introduced `search` method in `economic_customers_endpoint` to retrieve customers based on filters and pagination parameters.
- Enhanced response handling with JSON decoding for structured data retrieval.

services/nginx/app/modules/economic/endpoints/customers/economic_customers_endpoint.php

@@ -22,6 +22,21 @@ class economic_customers_endpoint
         return json_decode($response);
     }
 
+    /**
+     * Get customers by filters
+     * @param array $filters Example: ['filter' => 'value']
+     * @param array $pagination Example: ['maxPageSize' => 100, 'skipPages' => 0]
+     * @return object {collection: [product], pagination: {maxPageSize: number, skipPages: number, results: number}}
+     */
+    public function search(array $filters = [], array $pagination = []): object
+    {
+        $response = $this->send_request(
+            '/customers/?filter=' . self::filters($filters) . self::pagination($pagination),
+            'GET');
+        // Return the response as an object
+        return json_decode($response);
+    }
+
     /**
      * Does a customer exist?
      * @param int $customer_number