add web-app stub

web/vite.config.dev.ts

@@ -0,0 +1,12 @@
+import { defineConfig } from "vite";
+import wasm from "vite-plugin-wasm";
+import wasmPackWatchPlugin from "vite-plugin-wasm-pack-watcher";
+
+export default defineConfig({
+  build: {
+    watch: {
+      include: ["src/**/*.ts", "../src/**/*.rs"],
+    },
+  },
+  plugins: [wasmPackWatchPlugin(), wasm()],
+});