Use a local version of stdlib's package-list file for docs

Author: elizarov

gradle/dokka.gradle

@@ -35,6 +35,13 @@ dokka {
     outputFormat = 'kotlin-website'
     dependsOn(project.configurations.dokkaStubs)
 
+    noStdlibLink = true
+    
+    externalDocumentationLink {
+        packageListUrl = rootProject.projectDir.toPath().resolve("site/stdlib.package.list").toUri().toURL()
+        url = new URL("https://kotlinlang.org/api/latest/jvm/stdlib/")
+    }
+
     if (project.name != "kotlinx-coroutines-core") {
         dependsOn(project.configurations.compileClasspath)
         dependsOn(project.sourceSets.main.output)