Remove double negation in configuration option names

[mahozad]

Created this issue as discussed in #2513.

It would be great if the methods in Dokka Gradle plugin were converted to properties and also avoided double negative names.

So, for instance, noAndroidSdkLink.set(false) can be renamed to something like useAndroidSdkLink = true or isAndroidSdkLinkEnabled = true or enableAndroidSdkLink = true or similar.

As an example, here is some of Android Gradle Plugin (AGP) properties which were renamed in its recent versions:

android {
  buildTypes {
    release {
      isTestCoverageEnabled = true
      isMinifyEnabled = false
    }
  }
}

Are you willing to provide a PR?
Maybe (depends on if the maintainers want it and if I can).