Includes:
- Created css variables in JS.
- Added JS helpers.
- Replaced old sidebar by the "APP Bar" component from Material UI.
- Replaced logo by the new version.
- Added Avatar icon.
- Added Info Icon.
- Added Information Dialog, where the user can 'copy to the clipboard' the verdaccio commands.
- Added Verdaccio website documentation link.
- Added Drop Down Menu on the right side with a logout option
