Support for MUI v4 or MUI v5

After maintaining this project for over 3 years, we chose not to add support for MUI v4+ since it would require significant changes and there is already a built-in chip input. The same component is also available for MUI v5, and there are some alternatives like mui-chips-input. This is our collection of such components. Every component is maintained in its own repository and published as independent npm package. This way, we hope to give every component the amount of love and care it deserves to make it as good as possible.