feat: implement sudoless update system with polkit integration

- Add polkit rule for sudoless service management
- Improve update manager with multi-strategy restart approach
- Fix npm dependency conflicts in update process
- Add comprehensive test suite for update system
- Enhance frontend update progress tracking
- Update install script with automatic polkit setup

Author: rcourtman

.gitignore

@@ -96,4 +96,4 @@ pnpm-lock.yaml
 
 # Update mechanism
 backup/
-temp/ 
+temp/ ProxmoxVE/