[mdc-icon-button] unable to import core-styles mixin of icon-button as shown in documentation

[iKrishnaSahu]

Bug report

unable to import core-styles mixin of icon-button as shown in documentation - https://m2.material.io/develop/web/components/buttons/icon-buttons

// fails
@use '@material/icon-button' as icon-button;

// works
// @use '@material/icon-button/icon-button' as icon-button;

@include icon-button.core-styles;

Steps to reproduce

1. Open this stackblitz
2. Check if angular app is building

Actual behavior

Style import should work as shown in the documentation

Expected behavior

Style import is not working as shown in the documentation

Screenshots

Your Environment:

Software	Version(s)
MDC Web	Latest
Browser	Chrome
Operating System	Windows

Additional context

This seems like a miss in exporting styles file from barrel file.

Possible solution

Exporting _icon-button.scss from barrel file (_index.scss) should fix this issue