exam add user filter: register_days_range

resources/lang/zh_CN/exam.php

@@ -15,6 +15,7 @@ return [
         \App\Models\Exam::FILTER_USER_CLASS => '用户等级',
         \App\Models\Exam::FILTER_USER_REGISTER_TIME_RANGE => '注册时间范围',
         \App\Models\Exam::FILTER_USER_DONATE => '是否捐赠',
+        \App\Models\Exam::FILTER_USER_REGISTER_DAYS_RANGE => '注册天数范围',
     ],
     'require_value' => '要求',
     'current_value' => '当前',

resources/lang/zh_CN/label.php

@@ -150,6 +150,10 @@ return [
             'begin' => '注册时间开始',
             'end' => '注册时间结束',
         ],
+        'register_days_range' => [
+            'begin' => '注册天数最少',
+            'end' => '注册天数最多',
+        ],
         'donated' => '是否捐赠',
         'index_formatted' => '考核指标',
         'filter_formatted' => '目标用户',