Add js sample (node and browser)

sample/src/jsMain/kotlin/com/ionspin/kotlin/crypto/sample/App.kt

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+import com.ionspin.kotlin.crypto.hash.Hash
+import com.ionspin.kotlin.crypto.util.encodeToUByteArray
+import com.ionspin.kotlin.crypto.util.toHexString
+import kotlinx.css.br
+import react.RBuilder
+import react.RComponent
+import react.RProps
+import react.RState
+import react.ReactElement
+import react.dom.h1
+
+external interface RAppState : RState {
+    var currentState: String
+}
+
+external interface RAppProps : RProps {
+
+}
+
+class App(props: RAppProps) : RComponent<RAppProps, RAppState>(props) {
+    override fun RBuilder.render() {
+        val hash = Hash.sha512("123".encodeToUByteArray())
+        h1 {
+            +"Hash (SHA512) of 123: ${hash.toHexString()}"
+
+        }
+    }
+
+}
+
+fun RBuilder.app(handler: RAppProps.() -> Unit): ReactElement {
+    return child(App::class) {
+        this.attrs(handler)
+    }
+}

sample/src/jsMain/kotlin/com/ionspin/kotlin/crypto/sample/Main.kt

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+
+
+import com.ionspin.kotlin.crypto.LibsodiumInitializer
+import com.ionspin.kotlin.crypto.hash.Hash
+import com.ionspin.kotlin.crypto.util.LibsodiumRandom
+import com.ionspin.kotlin.crypto.util.encodeToUByteArray
+import com.ionspin.kotlin.crypto.util.toHexString
+import react.dom.render
+import kotlinx.browser.document
+import kotlin.browser.window
+
+fun main() {
+    val runningOnNode = jsTypeOf(window) == "undefined"
+    if (!runningOnNode) {
+        LibsodiumInitializer.initializeWithCallback {
+            render(document.getElementById("root")) {
+                app {
+
+                }
+            }
+        }
+    } else {
+        LibsodiumInitializer.initializeWithCallback {
+            val hash = Hash.sha512("123".encodeToUByteArray())
+            println("Hash (SHA512) of 123: ${hash.toHexString()}")
+        }
+    }
+}

sample/src/jsMain/resources/index.html

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+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Libsodium bindings sample app!</title>
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
+</head>
+<body>
+<div id="root"></div>
+<script src="sample.js"></script>
+</body>
+</html>