Add tests for DingTalk adapter content processing and markdown formatting

- Updated the assertion in `test_dingtalk_completed_input_lines_include_text_and_select_values` to remove unnecessary markdown formatting.
- Added new tests to verify that `_dingtalk_clean_form_content` maintains the order of prompts and completed values in various scenarios.
- Introduced `test_dingtalk_card_markdown_preserves_internal_line_breaks` to ensure internal line breaks are correctly converted to HTML line breaks.

scripts/build_dingtalk_card_template.py

@@ -602,9 +602,9 @@ def build_editor_data():
                 'conditionGroup': '',
                 'children': [
                     avatar('node_avatar', name='LangBot'),
+                    markdown_block('node_text_content', variable='content'),
                     input_block('node_input'),
                     select_block('node_select'),
-                    markdown_block('node_text_content', variable='content'),
                     button_group('node_btn_group'),
                 ],
             }