Update Kotlin to 2.1.0; Update Gradle to 8.6; Update kcp: KSP, SuspendTransform;

Signed-off-by: ForteScarlet <[email protected]>

Author: ForteScarlet

gradle.properties

@@ -44,6 +44,8 @@ org.gradle.caching=true
 #org.gradle.configuration-cache=true
 #org.gradle.configuration-cache.problems=warn
 
+# https://kotlinlang.org/docs/multiplatform-publish-lib.html#host-requirements
+kotlin.native.enableKlibsCrossCompilation=true
 
 # https://kotlinlang.org/docs/gradle-compilation-and-caches.html#the-new-kotlin-compiler
 #kotlin.experimental.tryK2=true