chore(electron): enhance packaging configuration and cleanup processes

- Updated compression setting to maximum in electron-builder configuration.
- Excluded screenshot directory from extra resources during packaging.
- Added new dependencies: electron-store, electron-updater, and ws.
- Improved cleanup scripts to remove unnecessary files and directories, optimizing the bundle size.
- Implemented logic to skip dev-only packages during the bundling process.

electron-builder.yml

@@ -1,7 +1,7 @@
 appId: app.clawx.desktop
 productName: ClawX
 copyright: Copyright © 2026 ClawX
-compression: normal
+compression: maximum
 artifactName: ${productName}-${version}-${os}-${arch}.${ext}
 
 directories:
@@ -21,6 +21,7 @@ extraResources:
       - "!icons/*.md"
       - "!icons/*.svg"
       - "!bin/**"
+      - "!screenshot/**"
   # OpenClaw package (node_modules copied separately by afterPack hook
   # because electron-builder respects .gitignore which excludes node_modules/)
   - from: build/openclaw/