Add simple rust wasm test

Needs an initial "npm install" and then "npm start" will build and launch it in the browser.

examples/rustwasmtest/webpack.config.js

@@ -0,0 +1,28 @@
+const path = require("path");
+const CopyPlugin = require("copy-webpack-plugin");
+const WasmPackPlugin = require("@wasm-tool/wasm-pack-plugin");
+
+const dist = path.resolve(__dirname, "dist");
+
+module.exports = {
+  mode: "production",
+  entry: {
+    index: "./js/index.js"
+  },
+  output: {
+    path: dist,
+    filename: "[name].js"
+  },
+  devServer: {
+    contentBase: dist,
+  },
+  plugins: [
+    new CopyPlugin([
+      path.resolve(__dirname, "static")
+    ]),
+
+    new WasmPackPlugin({
+      crateDirectory: __dirname,
+    }),
+  ]
+};