Material UI v5: move Box's system props to sx

Proprietary

Moves the system props of Box into its sx prop. Ported from the MUI codemod v5.0.0/box-sx-prop.

org.openrewrite.react.mui.v5.box-sx-prop
mod run . --recipe=org.openrewrite.react.mui.v5.box-sx-prop

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