feat(sass-ext): add @material/web/sass/ext helper utilities

PiperOrigin-RevId: 837998555

Author: asyncliz

commitlint.config.js

@@ -32,6 +32,7 @@ export default {
         'progress',
         'radio',
         'ripple',
+        'sass-ext',
         'select',
         'slider',
         'switch',