Create Kokoro TTS JavaScript library (#3)

* Set up JS project

* Finalise JS library

* Update README

* Fix package.json repository url

* Rename package -> `kokoro-js`

* Fix samples in README

* Cleanup README

* Bump `phonemizer` version

* Create web demo

* Run prettier

* Link to model used in demo

* Enable multithreading in HF space demo (~40% faster)

* Add link to demo in README

* Bump to v1.0.1

kokoro.js/demo/vite.config.js

@@ -0,0 +1,12 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  worker: { format: "es" },
+  build: {
+    target: "esnext",
+  },
+  logLevel: process.env.NODE_ENV === "development" ? "error" : "info",
+});