Please provide support for addDecorator in main.js

[maxbogus]

Is your feature request related to a problem? Please describe
In your next version you are planning to get rid off configure and addDecorator. This would ruin our storybook components support.
In our project we are using addDecorator to attach translations and styles to stories.

wrapper.js example:

const Wrapper = injectSheet(globalStyle)(
  ({ children }: { children: JSX.Element }) => children
);
const StoryWrapper = (story: () => JSX.Element) => (
  <LocaleProvider>
    {(locale: string) => (
      <LocalizationContainer key={locale} locale={locale}>
        <ThemeProvider theme={extendedIplUiTheme}>
          <FontsProvider>
            <Wrapper>{story()}</Wrapper>
          </FontsProvider>
        </ThemeProvider>
      </LocalizationContainer>
    )}
  </LocaleProvider>
);

StoryWrapper.defaultName = 'Story Wrapper';
export default StoryWrapper;

config.js example:
import { addDecorator, configure } from '@storybook/react'; addDecorator(wrapper);

Describe the solution you'd like
You could add new add-on type for such wrappers. For example: 'my-add-on/wrapper'.

Alternative solution would be
Don't remove addDecorator and config.js support in the next release.

Are you able to assist to bring the feature to reality?
Probably, I could try to assist, but I need some guidance..