Color palette with material colors

[ausichenko]

It would be very convenient to have a set of colors from Material Design in this library which would be used in the common code.

Color palette according to https://www.materialui.co/colors

Usage example: val green = MaterialPalette.LIGHT_GREEN_500

The approximate vision of implementation:

object MaterialPalette {
    ...
    val LIGHT_GREEN_100 = Color (...)
    ...
    val LIGHT_GREEN_900 = Color (...)
    val LIGHT_GREEN_A100 = Color (...)
    ...
}