DevDocs React documentation is missing code blocks from source documentation

# Documentation style bug

- Search for existing issues
https://github.com/freeCodeCamp/devdocs/labels/docs%2Fimprovement - did not find similar via queries like "React", "code block", "codeblock"

## Summary

The original React documentation usually presents a number of code blocks to demonstrate per concept or example. Often, one code block consists of multiple files which users can switch between, while devdocs only uses one of them. This article can be used for comparison: [source](https://react.dev/reference/react/StrictMode#fixing-bugs-found-by-re-running-effects-in-development) != [devdocs](https://devdocs.io/react/reference/react/strictmode#fixing-bugs-found-by-re-running-effects-in-development)

## Actual style

## Expected style