refactor: shared dir

[Tohrusky]

开个shared目录，放前后端交互的类型 和 IPC Channel 字符串

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Open a shared directory, place the types of front and back end interactions and IPC Channel strings

[Tohrusky]

把硬编码的IPC Channel 字符串全干掉

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Kill all hard-coded IPC Channel strings

[Tohrusky]

#47