Major 4.0 (#380)

- Migrated to WXT
- Migrated to NPM
- Added Insert & copy action
- Added ESLint

entrypoints/popup/main.tsx

@@ -0,0 +1,10 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+import App from "./App";
+import "./style.css";
+
+ReactDOM.createRoot(document.getElementById("root")!).render(
+	<React.StrictMode>
+		<App />
+	</React.StrictMode>
+);