feat: Initialize project with basic structure and dependencies

Sets up the foundational elements for the NewsCaster AI application. This includes:
- Initializing the project with Vite and React.
- Defining core types for articles and player state.
- Configuring build tools and TypeScript.
- Adding essential dependencies like React, Vite, and Google's Gemini API client.
- Providing initial README instructions for running locally.
- Setting up basic styling and structure in index.html.
- Defining available voices and playback constants.
- Implementing utility functions for audio handling.

index.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import App from './App';
+
+const rootElement = document.getElementById('root');
+if (!rootElement) {
+  throw new Error("Could not find root element to mount to");
+}
+
+const root = ReactDOM.createRoot(rootElement);
+root.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>
+);