DNS Stamps section in the "Setup guide" tab

### 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

### Description

Hello,

please add DNS stamps for encrypted endpoints with all encoded parameters required to connect to a secure DNS server as a single string in the "Setup guide" tab. Here is Go library for this - maybe useful:
https://github.com/jedisct1/go-dnsstamps

Thank you.
Best regards!🫡