Finding a Simpler Alternative to LintRule type

[notJoon]

Currently, LintRule is an interface type created to register lint rules, which not belongs to golangci-lint, in the lint engine.

However, as more lint rules are added, the number of functions also increases, which may make maintenance more difficult over time. Therefore, if there is a simpler architecture to replace the current LintRule, we should modify it to use that alternative.