feat: add .editorconfig for unifying the coding style for different editors and IDEs

[Skyenought]

What type of PR is this?

feat

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• [x] This PR title match the format: <type>(optional scope): <description>
• [x] The description of this PR title is user-oriented and clear enough for others to understand.

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en: add .editorconfig for unifying the coding style for different editors and IDEs zh(optional): 增加.editorconfig 文件，用于统一不同编辑器和IDE的编码风格。

Which issue(s) this PR fixes: