changed the creator for tasks from project_user to user, fixed api, documentation, filters, some other fixes

backend/modules/task/views/task-user/create.php

@@ -3,6 +3,7 @@
 
 /* @var $this yii\web\View */
 /* @var $model backend\modules\task\models\TaskUser */
+/* @var $task_id  */
 
 $this->title = 'Назначить сотрудника';
 $this->params['breadcrumbs'][] = ['label' => 'Task Users', 'url' => ['index']];
@@ -12,6 +13,7 @@ $this->params['breadcrumbs'][] = $this->title;
 
     <?= $this->render('_form', [
         'model' => $model,
+        'task_id' => $task_id,
     ]) ?>
 
 </div>