feat(deployer): skip sync on localhost and complete skill READMEs

Redeploy locally with docker compose when the node is 127.0.0.1 and
the image already exists. Make list/sync/remote/deb importable under
python3 -I -S. Add human README.md for every builtin skill, slim ack's
user-facing docs, and drop unused OpenSpec config.

skills/manage-release/README.md

@@ -4,6 +4,13 @@
 版本文件、worktree、分支、PR/MR 和合并。普通发布优先走“更新说明 + annotated tag”的
 短路径；只有发布要求修改仓库内容时，才进入准备版本的分支流程。
 
+## 安装
+
+```bash
+pouch add manage-release          # 当前项目
+pouch add manage-release -g       # 全局
+```
+
 ## 使用前准备
 
 - 项目已经是 Git 仓库，并配置了可访问的远端。