docs: hand the landing-page role from the README to maka.apache.org

[Astro-Han]

English

Follows #4307 Q4; supports #3404.

Problem

README.md and README.zh-CN.md run 291 and 287 lines and still serve as landing page, install guide and architecture summary. Since #4660, maka.apache.org is the landing page and the downloads path. The README and the repository description still open with "local-first AI agent workspace" while the homepage uses the positioning settled in #4307.

Outcome

Both READMEs and the .asf.yaml description open with the #4307 sentence, and the README keeps only what a reader inside the repository needs. Everything that describes the product to a newcomer links to the site instead.

Work

• Replace the opening of both READMEs and the .asf.yaml description with: "Apache Maka (Incubating) is a high-performance agent workspace that keeps a complete record of everything it did."
• Point the badge row and "Quick start" downloads at https://maka.apache.org/en/downloads/; drop the recommendation to build from source as the only path, and keep the Desktop Nightly and npm snapshot labels consistent with the downloads page.
• Cut "Why Maka", "Surfaces" and "Current capabilities" to a paragraph each that links the site; keep "Architecture", "Repository layout", "Local data and recovery" and "Development and verification" as the repository-facing content.
• Keep the two READMEs section-for-section identical, as today.
• Site test or docs check that the three surfaces carry the same sentence, so they cannot drift again.

Out of scope: homepage copy, which lives in website/src/copy/ and changes through #3404's fact-check cadence.

简体中文

承接 #4307 Q4；支撑 #3404。

问题

README.md 与 README.zh-CN.md 分别 291、287 行，仍同时充当 landing page、安装指南和架构摘要。自 #4660 起，maka.apache.org 已是 landing page 和下载入口。README 与仓库描述仍以 "local-first AI agent workspace" 开头，而首页用的是 #4307 定下的定位句。

目标

两份 README 与 .asf.yaml 的 description 以 #4307 定位句开头，README 只保留仓库内读者需要的内容；面向新人介绍产品的部分一律链接官网。

工作项

• 两份 README 开头与 .asf.yaml 的 description 改为："Apache Maka (Incubating) is a high-performance agent workspace that keeps a complete record of everything it did."
• 徽章行与 "Quick start" 的下载指向 https://maka.apache.org/en/downloads/；不再把源码构建作为唯一推荐路径，Desktop Nightly 与 npm snapshot 的标注与下载页保持一致。
• "Why Maka"、"Surfaces"、"Current capabilities" 各缩为一段并链接官网；"Architecture"、"Repository layout"、"Local data and recovery"、"Development and verification" 作为面向仓库的内容保留。
• 两份 README 继续逐章节对齐。
• 增加站点测试或文档检查，确保三处使用同一句话，不再漂移。

不在范围内：首页文案，位于 website/src/copy/，按 #3404 的事实核查节奏更新。

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Drafted with help from Claude Code. I reviewed the final text and take responsibility for posting it.