[Refacto] Mutualize the way the component is demonstarted in demo app by carting a common View

[ludovic35]

For each component we have same code :

     HStack(alignment: .center) {
            Spacer()
                 <THE_COMPONENT_TO_DEMO>
                .disabled(!model.enabled)
            Spacer()
        }
        .padding(.all, theme.spaces.spaceFixedMedium)
        .designToolboxBackground(onColoredSurface: false)
    }

The idea is to mutualize this code and to have <THE_COMPONENT_TO_DEMO> in a view that use the componnent according to the model of the configuration. Then, this view can be use later by UI tests where all values of the view model will be tested.