Working on js generator, adding initializers

multiplatform-crypto-libsodium-bindings/src/nativeMain/kotlin/com.ionspin.kotlin.crypto/Initializer.kt

@@ -0,0 +1,30 @@
+@file:Suppress("VARIABLE_IN_SINGLETON_WITHOUT_THREAD_LOCAL")
+
+package com.ionspin.kotlin.crypto
+
+import libsodium.sodium_init
+import kotlin.native.concurrent.AtomicInt
+
+actual object Initializer {
+
+    private var isPlatformInitialized : AtomicInt = AtomicInt(0)
+
+    actual suspend fun initialize() {
+        if (isPlatformInitialized.compareAndSet(0, 1)) {
+            sodium_init()
+        }
+
+
+    }
+
+    actual fun initializeWithCallback(done: () -> Unit) {
+        if (isPlatformInitialized.compareAndSet(0, 1)) {
+            sodium_init()
+        }
+        done()
+    }
+
+    actual fun isInitialized(): Boolean {
+        return isPlatformInitialized.value != 0
+    }
+}