Add user slice

[JaneMoroz]

Task Description
Add user slice

Technical Considerations

• Create features store
• Create user folder with userSlice, this slice is responsible for sign in/sign up/update user profile details
• Create necessary methods
• Create data.json or data.js with user data
• Add local storage support to save user data (email only for now, no server to get token) after sign in/ sign uo button are clicked

Additional Considerations

• Official manual
• Example