sync(skills-sh): 上游更新 20260903

[github-actions]

自动同步 skills-sh 上游 skills。

⚠️ skill 内容本质是 prompt 与脚本，合并前请审查变更。

 .../tools/xhs-downloader/batch_download.py         |    48 +
 .../tools/xhs-downloader/export_memory.py          |    67 +
 .../tools/xhs-downloader/export_to_workspace.py    |   101 +
 sync-state/skills-sh.json                          | 35746 +++++++++++-----
 40474 files changed, 4878176 insertions(+), 1036964 deletions(-)