PR #2050 updated the root README.zh-CN.md install commands after the
everything-claude-code → ECC rename, but the same stale marketplace URL
remained in nine docs/<locale>/README.md copies. Align those quick-start
and self-hosted install blocks so /plugin install ecc@ecc resolves the
ecc marketplace instead of everything-claude-code.
Adds de-DE docs, installer wiring, and locale tests. Pre-validated on current main with install manifest checks, markdownlint, locale-install tests, and ECC 2.0 release-surface tests.
Adds docs/th/README.md with a concise onboarding-style Thai
translation mirroring the docs/vi-VN format. Updates the language
switchers in the English, Simplified Chinese, Traditional Chinese,
Japanese, Korean, Portuguese (BR), Russian, Turkish, Vietnamese,
and Simplified Chinese docs READMEs to link to the new Thai page.
The English README remains the canonical source of truth; the Thai
page links back to it for full content.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
