chore(release): 0.16.1

- bump package.json / dsh.plugin.json / SIDEBAR_SERVICE_VERSION to 0.16.1
- README / README_EN: add v0.16.1 changelog (git panel freeze + restart
  loop #369: status truncation, bounded repo discovery, ?dsh-sidebar-reset
  escape hatch) and update the npm-channel install pin to ^0.16.1

dsh.plugin.json

@@ -1,6 +1,6 @@
 {
   "id": "dsh-external/dsh-better-sidebar",
-  "version": "0.16.0",
+  "version": "0.16.1",
   "main": "./lib/index.js",
   "description": "VSCode 风格右侧侧边栏：文件资源管理器 / 编辑器 / 终端 / Git / 浏览器，按会话隔离。暴露服务供其他插件注册侧边栏页面和文件预览器",
   "engines": {