Material UI v7: update the Grid props

Proprietary

Updates the props of the new Grid to its v2 API, as size={{ xs: 6 }}. Ported from the MUI codemod v7.0.0/grid-props.

org.openrewrite.react.mui.v7.grid-props
mod run . --recipe=org.openrewrite.react.mui.v7.grid-props

Install it once from Recipe actions, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.