docs(ai-request-rewrite): re-port with Admin API, ADC, and Ingress Controller tabs

[Yilialinn]

Summary

• Re-port ai-request-rewrite plugin documentation from API7 docs with all three configuration tabs (Admin API, ADC, Ingress Controller)
• Include nested Gateway API / APISIX Ingress Controller sub-tabs within the Ingress Controller tab
• 4 example sections: redact sensitive info, reformat data, summarize information, send to OpenAI-compatible LLM
• Update both English and Chinese documentation

[Copilot]

Pull request overview

This PR re-ports the ai-request-rewrite plugin documentation (EN/ZH) to include Admin API, ADC, and Ingress Controller (Gateway API + APISIX Ingress Controller) configuration tabs, along with several end-to-end examples demonstrating request rewriting use cases.

Changes:

• Added canonical links and Docusaurus Tabs/TabItem-based multi-configuration examples (Admin API / ADC / Ingress Controller with nested sub-tabs).
• Updated plugin attribute tables and expanded examples (redaction, reformatting, summarization, OpenAI-compatible providers).
• Updated both English and Chinese plugin docs to match the new structure.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 8 comments.

File	Description
docs/en/latest/plugins/ai-request-rewrite.md	Reworked EN docs with canonical link, attributes table, and tabbed examples across Admin API/ADC/Ingress.
docs/zh/latest/plugins/ai-request-rewrite.md	Reworked ZH docs similarly, adding canonical link, attributes table, and tabbed examples across Admin API/ADC/Ingress.

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