Scheduled time to update Blocklists

### Prerequisites

- [x] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [x] I have searched other issues and found no duplicates

- [x] I want to request a feature or enhancement and not ask a question

### The problem

Please add a field where we can schedule the blocklist updates.

This will allow us to set the update time for when traffic is low, giving the router a chance to update and deduplicate the lists without impacting performance.

### Proposed solution

### Alternatives considered and additional information

_No response_