Move to kapt for annotation processing (allows kotlin to be used in the core module)

build.gradle

@@ -23,6 +23,11 @@ buildscript{
     }
 }
 
+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.4.32'
+    id "org.jetbrains.kotlin.kapt" version "1.4.32"
+}
+
 allprojects{
     apply plugin: 'maven'
     
@@ -287,6 +292,16 @@ project(":ios"){
 
 project(":core"){
     apply plugin: "java-library"
+    apply plugin: "kotlin"
+    apply plugin: "kotlin-kapt"
+
+    kapt {
+        javacOptions {
+            option("-source", "14")
+            option("-target", "1.8")
+            option("--enable-preview")
+        }
+    }
 
     compileJava.options.fork = true
 
@@ -354,10 +369,9 @@ project(":core"){
         api "com.github.Anuken:rhino:$rhinoVersion"
         if(localArc() && debugged()) api arcModule("extensions:recorder")
 
-        compileOnly project(":annotations")
-        annotationProcessor project(":annotations")
         annotationProcessor 'com.github.Anuken:jabel:34e4c172e65b3928cd9eabe1993654ea79c409cd'
-
+        compileOnly project(":annotations")
+        kapt project(":annotations")
     }
 
     afterEvaluate{