Add sync-readme-translations skill to automate README updates across languages

Author: shps951023

.github/skills/sync-readme-translations/SKILL.md

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+---
+name: sync-readme-translations
+description: "Sync changes from the English README.md to all translated README files. Use when: updating README translations, syncing README across languages, propagating README changes to other locales."
+argument-hint: "Describe what changed in README.md that needs syncing"
+---
+
+# Sync README Translations
+
+Propagate content changes from the English `README.md` to all translated versions, preserving each language's natural phrasing.
+
+## Target Files
+
+| File | Language |
+|------|----------|
+| `README.zh-CN.md` | 简体中文 (Simplified Chinese) |
+| `documents/README.zh-TW.md` | 繁體中文 (Traditional Chinese) |
+| `documents/README.ja.md` | 日本語 (Japanese) |
+| `documents/README.ko.md` | 한국어 (Korean) |
+| `documents/README.it.md` | Italiano (Italian) |
+| `documents/README.fr.md` | Français (French) |
+
+## Procedure
+
+1. **Read the English README.md** to identify the changed sections.
+2. **For each translated file**, read the corresponding section and apply the same change in that language.
+3. **Preserve localized phrasing** — translate new/changed text naturally; do not produce literal word-for-word translations.
+4. **Keep shared elements untranslated** — badges, image paths, links, HTML tags, table structure, and code blocks must stay identical across all files.
+5. **Use `multi_replace_string_in_file`** to batch all edits efficiently when multiple files need the same structural change.
+6. **Verify** that the number of edits matches the number of target files × changed sections.
+
+## Rules
+
+- Never remove or reorder sections that exist in a translated file but not in English — the structures are kept in sync.
+- Benchmark numbers (scores, case counts) are language-neutral; copy them verbatim.
+- If a section doesn't exist yet in a translated file, add it at the same position as in the English README.
+- All paths in links/images are relative to the repo root and must not change.

.vscode/settings.json

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-{
-    "github.copilot.chat.backgroundCompaction": true,
-    "github.copilot.chat.summarizeAgentConversationHistoryThreshold": 170000
-}