Add route to Login button

[monarxxjain]

The current navbar lacks a route to the login page, which is crucial for user authentication and access to the platform's features. Additionally, in mobile view, there is no login button available in the sidebar. This issue aims to address these concerns by adding a link to the login page in both the navbar and sidebar for mobile users.

Task to be Done:

• Add a login page route to the navbar.
• Add a login button into the sidebar for mobile view.
• Ensure that the link directs users to the already created login page.
• The sidebar is specifically visible in the mobile view of the application.

Additional Information:

• The login page has already been created and integrated into the application at route /login.
• The navbar is a key navigation component visible across all pages of the application.
• The implementation should be tested across different screen sizes to ensure responsiveness.