Introduce goals module with methods for result, percentage, and remaining calculations

- Add `goals` class for managing goal metrics and calculations.
- Extend `goals_criteria` with timeframe initialization and validation.
- Implement `getListByCriteria` in `order_items_o.php` for product-based goal evaluation.
- Add unit tests for `goals` to validate

services/nginx/app/modules/goals/classes/goals_criteria.php

@@ -41,6 +41,8 @@ class goals_criteria implements goals_criteria_i
         $this->users = new goals_criteria_users();
         $this->departments = new goals_criteria_departments();
         $this->products = new goals_criteria_products();
+        $this->start = new \DateTime();
+        $this->end = new \DateTime();
     }
 
 }