DNS query record filtering

### 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 querying DNS records for a keyword, such as "chatgpt," there will be many duplicate records. The effective queries are all records related to the keyword, not just repeated records for one domain. This makes it easier to collect all relevant DNS domains.

### Proposed solution

It is recommended to provide an option like "merge duplicate records" in the record type selection.

### Alternatives considered and additional information

_No response_