Add state cleanup for delegated and pure. There doesn't seem to be a easy way to clean js state

multiplatform-crypto/src/commonMain/kotlin/com/ionspin/kotlin/crypto/Crypto.kt

@@ -137,6 +137,10 @@ class MultipartAuthenticatedEncryptor internal constructor(val key : SymmetricKe
     override fun startEncryption(): MultipartEncryptionHeader {
         return header
     }
+
+    override fun cleanup() {
+        primitive.cleanup()
+    }
 }
 
 class MultipartAuthenticatedDecryptor internal constructor(val decryptor: XChaCha20Poly1305Pure) : MultipartAuthenticatedDecryption {
@@ -144,4 +148,8 @@ class MultipartAuthenticatedDecryptor internal constructor(val decryptor: XChaCh
         return DecryptedDataPart(decryptor.streamDecrypt(data.data, additionalData, 0U))
     }
 
+    override fun cleanup() {
+        decryptor.cleanup()
+    }
+
 }

multiplatform-crypto/src/commonMain/kotlin/com/ionspin/kotlin/crypto/authenticated/XChaCha20Poly1305Pure.kt

@@ -84,6 +84,8 @@ class XChaCha20Poly1305Pure(val key: UByteArray, val nonce: UByteArray) {
         calcNonce[1] = 0U
         calcNonce[2] = 0U
         calcNonce[3] = 0U
+        key.overwriteWithZeroes()
+        nonce.overwriteWithZeroes()
         println("Calckey-------=")
         calcKey.hexColumsPrint()
         println("Calckey-------=")
@@ -184,6 +186,13 @@ class XChaCha20Poly1305Pure(val key: UByteArray, val nonce: UByteArray) {
         return plaintext
     }
 
+    fun cleanup() {
+        key.overwriteWithZeroes()
+        nonce.overwriteWithZeroes()
+        calcKey.overwriteWithZeroes()
+        calcNonce.overwriteWithZeroes()
+    }
+
 
 
     private fun processPolyBytes(updateableMacPrimitive: Poly1305, data: UByteArray) {