[sync] Support ThemeProvider like CssVarsProvider

[oliviertassinari]

Summary

Material UI Sync works with <CssVarsProvider> only, how to handle <ThemeProvider>?

• https://material-ui-sync.canny.io/feedback/p/any-guide-for-themeprovider -https://material-ui-sync.canny.io/feedback/p/how-to-use-the-exported-javascript-object-with-createtheme
• https://material-ui-sync.canny.io/feedback/p/plugin-only-return-the-components-button-and-switch
• https://www.figma.com/community/plugin/1336346114713490235?comment=1403674200727536319

Motivation

We are in the process of moving everyone to the CSS variable-powered theme. But for more legacy use cases, it would be great to be backward compatible. It seems to be easy to implement.

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[vaarga]

As far as I know (if I understand your request correctly), this issue has already been resolved in Material UI v6.