feat(firebase): Add Firebase SDK and initialize Analytics

This commit integrates the Firebase SDK into the application to enable Firebase services, starting with Google Analytics.

Key changes include:
- Added the `firebase` package as a dependency.
- Included Firebase project configuration variables in the production environment file.
- Created a new `firebase.ts` utility to centralize Firebase app initialization.
- Integrated the `FirebaseAnalytics` component into the root layout to enable analytics tracking across the entire application.

public/firebase-messaging-sw.js

@@ -0,0 +1,16 @@
+importScripts("https://www.gstatic.com/firebasejs/8.10.0/firebase-app.js");
+importScripts(
+  "https://www.gstatic.com/firebasejs/8.10.0/firebase-messaging.js",
+);
+
+firebase.initializeApp({
+  apiKey: "AIzaSyCTjdsk2jE34IfnvSKP1JMTIf_Abd7tbt0",
+  authDomain: "opplens-270d1.firebaseapp.com",
+  projectId: "opplens-270d1",
+  storageBucket: "opplens-270d1.firebasestorage.app",
+  messagingSenderId: "6923326255",
+  appId: "1:6923326255:web:584a017e8e1bd0e4ed87da",
+  measurementId: "G-VQW40G8VKC",
+});
+
+const messaging = firebase.messaging();