Server-side storage support for todo widget

[MarioKuka]

Already implemented in PR #838, which enhances the todo widget functionality by adding support for server-side storage, allowing todo tasks to be persisted and synced across different devices and browsers.

[beatrizq]

Yes, please make this happen. There's already a functional pull request, just need to accept 🙏

[tinyoverflow]

There's a PR for a similar implementation for the todo widget: #838

[MarioKuka]

@tinyoverflow good work, much better version.