Add ClassNames on elements for better styling support

[saadanzari]

Description

As the portal-shared-components is used in multiple projects as base components reusable library,
I want to add ClassNames on elements for better styling support in other applications which are using portal-shared-components as npm packinge,
so that we can easily modify the color themes in the application level .

Acceptance Criteria

• ClassNames are applied on components
• ClassNames are applied on tags with states changes

Additional Information

This should be done for all of the components for consistency purpose.
add prefifx cx- for classNames for better code separation