docs: add Chinese language support to wasm documentation

[bestjane]

Description

Add Chinese language support to wasm documentation

Checklist

• [x] I have explained the need for this PR and the problem it solves
• [x] I have explained the changes or the new features added to this PR
• [x] I have added tests corresponding to this change
• [x] I have updated the documentation to reflect this change
• [x] I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[kayx23]

• Please fix for CI errors.
• The doc needs to be added to the sidebar in this file docs/zh/latest/config.json.

Cheers

[kayx23]

Still has CI errors

[github-actions[bot]]

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[github-actions[bot]]

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