This change adds [LeftHook](https://lefthook.dev/) as a GitHub hook management tool alongside [MegaLinter](https://megalinter.io/) to lint all relevant files within the repository.
* fix: explicitly specify ipv4 addresses
This change fixes the AdGuard Home generation script by disabling the return of ipv6 addresses. This would have been causing issues for users who are running dual stack with the addresses that accept both ipv4 and ipv6 traffic.
* fix: explicitly block returning on ipv6 queries