Pull request 2111: 6545-schema-version

Updates #6545.

Squashed commit of the following:

commit b1969128a99ff21c97feb4e7805b4b8133d7122f
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Dec 15 20:04:37 2023 +0300

    home: fix import

commit 872ccea1491a8da76cc24db79247438d0ce4d256
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Dec 15 20:01:15 2023 +0300

    all: output schema version

CHANGELOG.md

@@ -25,6 +25,9 @@ NOTE: Add new changes BELOW THIS COMMENT.
 
 ### Added
 
+- The schema version of the configuration file to the output of running
+  `AdGuardHome` (or `AdGuardHome.exe) with `-v --version` command-line options
+  ([#6545]).
 - Ability to disable plain-DNS serving via UI if an encrypted protocol is
   already used ([#1660]).
 
@@ -34,6 +37,7 @@ NOTE: Add new changes BELOW THIS COMMENT.
   work on iOS ([#6352]).
 
 [#6352]: https://github.com/AdguardTeam/AdGuardHome/issues/6352
+[#6545]: https://github.com/AdguardTeam/AdGuardHome/issues/6545
 
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 NOTE: Add new changes ABOVE THIS COMMENT.