Scheduled Backups

### 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

When reinstalling AdGuard via the provided script, it overwrote my .yaml file containing months of configurations and settings I had applied with seemingly no recourse to reverse that action or find a backup to replace it as I had expected the reinstall process to either not wipe the config, or use it in the new build.

The reinstall process was `https://github.com/AdguardTeam/AdGuardHome?tab=readme-ov-file#automated-install-linuxunixmacosfreebsdopenbsd` with the `-r` flag

### Proposed solution

Have a setting where the AdGuard yaml file which holds all the data, gets backed up on a set schedule such as every week

### Alternatives considered and additional information

_No response_