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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dsh-better-sidebar",
-  "version": "0.16.0",
+  "version": "0.16.1",
   "description": "DSH web plugin: a VSCode-like right sidebar (explorer / editor / terminal / git / browser), isolated per conversation session. Exposes a service for other plugins to register sidebar tabs and file viewers.",
   "type": "module",
   "repository": {