Add google translate mirror setting

[jawa0919]

can set some free google translated mirror, Quickly use Google Translate

more pls read mirror docs

[jawa0919]

fix https://github.com/intellism/vscode-comment-translate/issues/126

[intellism]

谢谢PR。 马上休假了，会尽快合并发布新版本。

[jawa0919]

when will it be released

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什么时候发布