add: SK support

[michal0000000]

Added support for SK domains

[likexian]

Hello @michal0000000
Thanks for your works! but the ci is failed.

  Running [/home/runner/golangci-lint-1.61.0-linux-amd64/golangci-lint run --out-format=github-actions -v] in [] ...
  Error: File is not `gofmt`-ed with `-s` (gofmt)
  Error: File is not `gofmt`-ed with `-s` (gofmt)
  Error: ineffectual assignment to token (ineffassign)
  Error: assigned to token, but reassigned without using the value (wastedassign)

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[michal0000000]

Thanks for having a look at my PR.
Hopefully I fixed the issue.

[likexian]

Hello @michal0000000
Thanks for your works.

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