0.3.6 — plugin registry, Unreal extracted to a plugin, in-app update check + fixes

- Official plugin registry hosted on Gitea; client fetches registry.json over
  HTTPS and installs plugins via backend plugin_write_file.
- Auto-install autoInstall plugins on first connect; per-machine enabled state.
- Extract all Unreal tooling (Build Solution / Unreal Log) into a separate
  "unreal" plugin (defaultEnabled) driven through the new host.ue bridge;
  core UI no longer hard-wires Unreal.
- Settings → Plugins: "Official plugins" section with Install buttons.
- Status bar: "Updates" button (right of Log) triggers an update check without
  restarting the client.
- Fixes: NEW badge hard-right/centered without shifting text; History commit
  size no longer flickers (cached per change); giant icons in empty plugin/
  People lists; Get Latest hover contrast.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "exbyte-depot",
   "private": true,
-  "version": "0.3.5",
+  "version": "0.3.6",
   "type": "module",
   "scripts": {
     "dev": "vite",