Add and remove some abilities of main.py

[MCIOXZ]

CN

• 导入了json和sys模块。
• 当无法获取MAC地址时，将提示手动输入MAC地址。
• 添加了从配置读取host和mac地址的功能。当需要重新获取密码时，可以选择使用之前的配置。
• 添加了将host和mac地址保存进配置文件的功能。
• 注释了一些debug输出。
• 注释了clear_console()的调用。

EN

• import json and sys.
• When unable to obtain the MAC address, it will prompt to manually enter the MAC address.
• Added the ability to read host and MAC addresses from configuration. When it is necessary to retrieve the password again, you can choose to use the previous configuration.
• Added the ability to save the host and MAC address into the configuration file.
• Annotated some debug outputs.
• Annotated the call to clear_comsole() .