React: create NavBar to handle Login/SignUp and various features

[SirrorsMoore1975]

• [x] create a NavBar
• [x] show login / logout and or Sign Up
• [ ] (optional) show profile picture
• [x] (optional) show Time
• [ ] (optional) Greet / Welcome you User when login

[SirrorsMoore1975]

Require more attention to login/ signin --> logout

• [ ] Consider a new issue later for better protection to route

[SirrorsMoore1975]

Additional:

• [x] Warn user if the login credential or login service has failed
• [ ] those tester who hasn't got username and address should give them some username and address
• [ ] (optional) give a strength password test in the Sign Up page

[SirrorsMoore1975]

• [x] Connect Database and add new user
• [ ] Connect Database and update user (optional)