v1.1.0: Updated fastruct to make it more practical

1. Added --nopath parameter. When this parameter is used, the file path is not displayed after the file name.
2. Added depth warning mechanism. If the depth exceeds 5, a warning will be issued before execution to prevent screen flooding due to incorrect operations.
3. Added --saveto [PATH] parameter, which allows saving fastruct's output to a specified directory. If not specified, the current working directory is used by default.
4. Changed the number of prefix dashes to make the output structure clearer. The default is the depth warning threshold of 5.

1.增加--nopath参数，若加上此参数，则文件后不跟具体路径。
2.增加深度预警机制，若depth超过5,则会先警告再执行，防止错误操作导致刷屏。
3.增加--saveto [PATH]参数，可将fastruct的输出结果存到某个目录，若不加，则默认为工作目录。
4.深度前缀变更了数量，使得输出结构更清晰，默认为深度预警机制的阈值5。

v1.0.0: Enhance README with comprehensive tool documentation

Added detailed documentation for Fastruct, including installation instructions, usage examples, and file type recognition.