wgpu + wasm + worker (#8)

initial setup

static/index.js

@@ -0,0 +1,10 @@
+import wbg_init, { main, App } from "../pkg/wasm-index.js";
+
+const start = async () => {
+  await wbg_init();
+
+  main();
+  const app = new App();
+};
+
+start();