[Feature Request] Add a function to generate Mantine custom colors

[AnnMarieW]

It looks like the Mantine Colors Generator is available as a separate package: https://www.npmjs.com/package/@mantine/colors-generator

It would be nice to be able to generate a custom color sequence from within an app.

import { generateColorsMap } from '@mantine/colors-generator';

const hexString = "#FFFFFF";
const { colors, baseColorIndex } = generateColorsMap(hexString);

// colors = MantineColorsTuple
// baseColorIndex = MantineTheme.primaryShade index