finish custom field basic

lang/chs/lang_fields.php

@@ -15,7 +15,15 @@ $lang_fields = [
     'col_help' => '辅助说明',
     'col_options' => '选项',
     'col_action' => '操作',
+    'col_is_single_row' => '展示时单独一行',
     'js_sure_to_delete_this' => '你确信要删除此项目吗？',
-    'submit_submit' => '提交'
+    'submit_submit' => '提交',
+    'field_type_text' => '短文本',
+    'field_type_textara' => '长文本',
+    'field_type_radio' => '横向单选',
+    'field_type_checkbox' => '横向多选',
+    'field_type_select' => '下拉单选',
+    'field_type_image' => '图片',
+    'field_type_file' => '文件',
 
 ];