docs(community): add Xenon Skill and MCP interoperability guide

[xianyu-sheng]

Summary

• add Chinese and English community documentation for reusing VeADK-compatible SKILL.md directories and stdio MCP servers in Xenon
• use the existing examples/codex_with_skill_and_mcp weather example for executable setup and verification commands
• update the reproducible documentation baseline to the published Xenon v0.7.3 release
• document the component mapping and explicitly state that this does not add Agent(runtime="xenon") support

Validation

• fumadocs-mdx, next typegen, and tsc --noEmit passed for the original integration change
• the full static site build generated 288/288 pages, including both Xenon routes
• Ark CLI 1.0.4 plus Xenon v0.7.2 originally installed and discovered 24/24 embedded Skills with 0 errors; v0.7.3 does not change the versioned integration contract, Skill roots, or MCP transports
• the repository weather MCP example previously completed initialize, tools/list, and get_weather: 1 server / 1 tool, about 480 ms
• current Xenon v0.7.3 full offline suite: 1662 passed, 38 deselected
• v0.7.3 wheel and sdist pass package metadata checks

中文说明

本 PR 增加 Xenon 与 VeADK 在标准 Skill/MCP 组件层的双语互操作指南，并清楚区分“组件复用”和“VeADK 原生 Xenon runtime 适配”。文档现以已发布的 Xenon v0.7.3 为稳定版本基线；v0.7.3 的缓存更新不改变这里使用的集成契约。

[xianyu-sheng]

Xenon v0.7.3 baseline update — 2026-07-27

Xenon v0.7.3 is published, and this PR's bilingual guide now targets it in commit 83194f1. The Skill roots, MCP transports, integration CLI schema, and runtime-adapter boundary are unchanged. Current Xenon offline suite: 1662 passed, 38 deselected.