Remove compile time linkage in favour of class index

Optimize build time when no change happened for the BauSystem

BauSystem/BauSystem_Main/build.gradle.kts

@@ -23,7 +23,6 @@ plugins {
 
 tasks.compileJava {
     options.isWarnings = false
-    options.compilerArgs.add("-AprojectDir=$projectDir")
 }
 
 java {
@@ -32,8 +31,6 @@ java {
 }
 
 dependencies {
-    annotationProcessor(project(":BauSystem:BauSystem_Linkage"))
-    annotationProcessor(project(":SpigotCore"))
     compileOnly(project(":SpigotCore"))
 
     compileOnly(libs.spigotapi)
@@ -43,7 +40,9 @@ dependencies {
     compileOnly(libs.nms20)
     compileOnly(libs.fawe18)
 
-    implementation(project(":BauSystem:BauSystem_Linkage"))
+    compileOnly("org.atteo.classindex:classindex:3.13")
+    annotationProcessor("org.atteo.classindex:classindex:3.13")
+
     implementation(libs.luaj)
     implementation(files("$projectDir/../libs/YAPION-SNAPSHOT.jar"))
 }