Added Toggle for Password Visibility and Implemented Functional Log Out Button

[abir499-ban]

Issue Fix #54 : Display Log In / Log out button on Home page

This PR addresses the issue #54 which focusses mainly on adding a functional Log In button when the user is not logged In and similarly a Log out button when the user is Logged In. The following improvements have been made:

1. Added a Log out button in the application which allows the logged in user to safely log out of the application
2. Similarly, added a Log In button which directs the user to the /admin route to allow him/her to sign in, so that he/she does not have to manually go to the /admin route.
3. Implemented the seamless feature of alternatively displaying the Log in or Log out button depending on the state of the user.
4. Made sure that when the user is Logged in, he/she does not have access to the /admin route as the route allows the user to sign in into the application. A already signed in user having access to the Log in page via the /admin route is redundant.
5. Implemented the Toggle button in the password input field, to switch between view and hide password while entering it.

Please consider this PR.

[github-actions]

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[jinx-vi-0]

@abir499-ban fix merge conflict

[abir499-ban]

@jinx-vi-0 fixed merged conflicts 👍