feat: Initialize GreenLens project with core dependencies and structure

Sets up the project using Vite, React, and TypeScript. Includes initial configuration for Tailwind CSS, Gemini API integration, and local storage management. Defines basic types for plant data and UI elements. The README is updated with local development instructions.

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>
+);