Fix Gradle HasConvention error by upgrading Kotlin plugin and fixing gradlew wrapper

Co-authored-by: Mte90 <[email protected]>

Author: Copilot

ide-plugins/build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
     id("java")
-    id("org.jetbrains.kotlin.jvm") version "1.9.0"
+    id("org.jetbrains.kotlin.jvm") version "2.0.21"
     id("org.jetbrains.intellij") version "1.15.0"
 }