enable download of javadoc in gradle

build.gradle.kts

@@ -7,6 +7,14 @@ plugins {
     `maven-publish`
     id("io.freefair.lombok") version "9.0.0"
     id("io.spring.dependency-management") version "1.1.7"
+    id("idea")
+}
+
+idea {
+    module {
+        isDownloadJavadoc = true
+        isDownloadSources = true
+    }
 }
 
 repositories {