SafeSearch option for Brave engine

### 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

Hello,

we don't have a safesearch option for Brave engine.

### Proposed solution

Please, add safesearch preset for Brave search engine. We just need to add CNAME record for:
`search.brave.com`
point to:
`safe.search.brave.com`

### Alternatives considered and additional information

_No response_