MantineColorSchemeManager async get / set?

[songkeys]

Currently, it only supports synchronous get/set operations, similar to localStorage usage.

mantine/packages/@mantine/core/src/core/MantineProvider/color-scheme-managers/types.ts

Line 3 in 00a94ce

export interface MantineColorSchemeManager {

However, in some cases, the value might be retrieved from the cloud. In my situation, I'm using Mantine in a Chrome extension that stores persistent values through [cloud.storage](https://developer.chrome.com/docs/extensions/reference/api/storage) methods, which only support asynchronous operations.