Support for DNS over HTTPS

[arturstat]

Issue Details

Currently AdGuard VPN browser extension only supports DNS over TLS.
The Android and Windows apps support DNS over HTTPS already.

Proposed solution

Implement DNS over HTTPS on the AdGuard browser extension.

Alternative solution

No response

[alexx7311]

@arturstat, hello! Thanks, we'll think about it!

[alexx7311]

@arturstat And by the way, why do you prefer DoT over DoH?

Let's see how many upvotes this issue gets.

[arturstat]

Actually, I prefer DoH over DoT.
Because a lot of the internet traffic is HTTPS already, I believe DoH offers more privacy.