chore: move scripts to tools directory

Move analyze_excel.py, excel_to_markdown.py, and locator_helper.py
into the tools/ subdirectory to improve project organization.

convert_excel_demo.py

@@ -1,23 +0,0 @@
-"""
-Excel 转换工具使用示例
-"""
-from utils.excel_converter import ExcelConverter
-
-
-def main():
-    # 创建转换器（verbose=True 打印详细日志）
-    converter = ExcelConverter(verbose=True)
-
-    # 转换 Excel 文件
-    input_file = "data/离散备料计划打印模版-布莱迪.xlsx"
-    output_file = "data/离散备料计划打印模版-布莱迪_转换.xlsx"
-
-    # 执行转换
-    df = converter.convert(input_file, output_file)
-
-    print(f"\n转换完成！")
-    print(f"数据形状: {df.shape}")
-
-
-if __name__ == "__main__":
-    main()