fix: move firebase init outside component to prevent loops

[vibhutomer]

• Closes Firebase Re-initialization Loop #60

Description of Changes

• Moved the initFirebase() call from inside the Home functional component to the top-level module scope in Govt-Billing-React/src/pages/Home.tsx.
• This ensures the Firebase app is initialized exactly once when the application loads, rather than on every state update or re-render.

Impact

• Stability: Prevents the Firebase: Firebase App named '[DEFAULT]' already exists error.
• Performance: Reduces unnecessary logic execution during the React component lifecycle.
• Clean Code: Adheres to React best practices for side-effects and global initializations.

Testing Done

• Verified that the application initializes correctly on startup.
• Confirmed that UI interactions (menu toggles, file switching) no longer trigger re-initialization logic.