✨ [Feature]: 官网中英文切换

[IKEYCY]

What problem does this feature solve

是否有考虑加个中英文切换按钮，英文文档目前也比较完善了

What does the proposed API look like

添加中英文切换，可以跳转到https://opentiny.design/tiny-vue/en-US/os-theme/overview

What is your project name

官网中英文切换

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

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Title: ✨ [Feature]: Switch between Chinese and English on the official website