react-jsonschema-form: @rjsf/material-ui breaks tree shaking

Prerequisites

• I have read the documentation;
• In the case of a bug report, I understand that providing a SSCCE example is tremendously useful to the maintainers.
• Ideally, I’m providing a sample JSFiddle or a shared playground link demonstrating the issue.

Description

Importing @rjsf/material-ui into a project bundled with esbuild causes bundle size to increase a lot.

This seems to be because of https://github.com/rjsf-team/react-jsonschema-form/blob/master/packages/material-ui/src/Theme5/Mui5Context.tsx#L11, which causes the entire @mui/icons-material package to be included in the bundle.

Bundle size with @rjsf/material-ui included: 6,9M Bundle size without @rjsf/material-ui: 2,4M

Steps to Reproduce

1. Include @rjsf/material-ui in a project
2. Bundle it using a tree-shaking enabled bundler (like esbuild)
3. Compare bundle sizes before and after @rjsf/material-ui inclusion

Expected behavior

The icons should be tree-shaken and only icons used by the application should be included in the bundle.

Actual behavior

All icons from the @mui/icons-material package are included in the bundle.

Version

        "@rjsf/core": "^4.0.1",
        "@rjsf/material-ui": "^4.0.1",