build(gradle): fix sources download in intellij idea

Author: xeruf

build.gradle.kts

@@ -11,13 +11,21 @@ plugins {
 
     application
     kotlin("jvm") version "1.9.25"
+    id("idea")
     id("org.openjfx.javafxplugin") version "0.1.0"
     id("com.github.johnrengelman.shadow") version "6.1.0"
 
     id("com.github.ben-manes.versions") version "0.47.0"
     id("se.patrikerdes.use-latest-versions") version "0.2.18"
 }
 
+idea {
+    module {
+        isDownloadSources = true
+        isDownloadJavadoc = true
+    }
+}
+
 val backend = gradle.includedBuilds.last()
 
 val versionFromBackend by lazy {