Feature Request: Need to add dark and light toggle feature.

[ayushraaj-01]

Problem Statement

The application currently supports only a single theme mode, which can cause discomfort for users in varying lighting environments. For example:

1. Using a bright theme at night may cause eye strain.

2. Using a dark theme in bright daylight can reduce visibility.

Proposed Feature

Add a Dark/Light Mode Toggle that allows users to manually switch between themes at any time.

1. The chosen theme should be stored locally (e.g., local storage or user settings) so it persists across sessions.

Possible Enhancements / Alternatives

1. Auto-switch themes based on system preferences or time of day.

2. Provide custom color palette options for advanced users.

Why This Matters

1. Enhances accessibility and usability.

2. Reduces eye strain in low-light conditions.

3. Improves visibility in bright environments.

4. Keeps the app aligned with modern UI/UX practices.