[FEAT] Add props to `Header` component

[diogoverde]

Is your feature request related to a problem? Please describe. The Header component has no option to remove the shadow for mobile present in the Box component that originates it. This option exists in the figma design file.

Describe the solution you'd like Add props to the Header component to able to remove these shadows if needed.

Describe alternatives you've considered We have tried changing the component itself, removing the shadow which should not be the solution and it still does not work, since the shadow comes from the Box component itself.

Additional context In case the figma link is not accessible I'll leave a screenshot here for ease of use.