[GlobalDev] Add multi-language README and documentation site

[GlobalDevBot]

GlobalDev Agent Growth Task

Priority: Low

Why this matters

The existing Chinese README shows intent; expanding it nurtures a global contributor base.

Suggested next step

• Review this task with the product / DevRel owner.
• Convert it into a concrete implementation or launch checklist item.

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GlobalDev-Key: 46170f234254f853
Generated by GlobalDev Agent from the repository launch analysis workflow.