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 v0.8.2 release
• document the component mapping and explicitly state that this does not add Agent(runtime="xenon") support

About Xenon v0.8.2

Xenon is an open-source terminal AI coding agent built around an online Evidence Runtime — a deterministic, zero-LLM verification chain that runs vertically through the whole task lifecycle (plan → pre-tool → execution → patch-binding → delivery). Its core contract: an LLM statement is a claim; only a tool result is evidence. This catches "pasted a diff but never wrote the file" hallucinations at delivery time with zero false-kills.

On the SWE-bench_Lite official harness (30 instances × 5 engines, single attempt, cheapest model tier), Xenon reaches 40.0% instance-level / 45.8% cell-level with a fully reproducible report (sampling seed, grading method, cost accounting, no-patch attribution) committed to the repo. Same-model A/B (v0.8.0 → v0.8.2, DeepSeek V4 Flash): +6.7pp instance / +11.0pp cell attributable to the framework itself.

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 plus Xenon installed and discovered all embedded Skills with 0 errors; the v0.8.2 integration contract, Skill roots, and MCP transports are unchanged
• the repository weather MCP example completed initialize, tools/list, and get_weather
• Xenon v0.8.2 full offline suite: 2110 passed (unit + integration), ruff and compileall green

[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.