feat: Update PulpUI to React 19

[Redtigercod4]

Summary

React 19 released on 25 April 2024, bringing a fleet of new features to the framework, whilst also deprecated a variety of functions. As PulpUI has already been upgraded to React@18.3.1, this allows the deprecated functions to be make visible for refactor. With the JavaScript eco-system rapidly changing and the introduction of PatternFly 6, migrating to the latest React version will provide a range of performance & security benefits, avoiding future issues when support drops for React 18.

Tasks

1. Understand current dependency requirements for React and peer dependencies.
2. Update Package Files: Bump react, react-dom, @types/react and @types/react-dom to 19.2.8
3. Deploy react/19/migration-recipe codemod to convert deprecated functions to new standards.
4. Deploy types-react-codemod to convert deprecated types to new standards.
5. Run Cypress tests & run UI build steps
6. Document minor issues found for future attention within Github Issues.

Packages to be updated

1. react-markdown

Packages of concern

1. file-saver
2. compare-versions

Found Blockers (To be updated throughout work)

1. @patternfly packages require upgrade to 6.6.0 to support React 19.

References

1. https://react.dev/blog/2024/04/25/react-19-upgrade-guide
2. ReactFragment deprecated in React 19, replace with ReactNode #178
3. https://www.npmjs.com/package/react
4. https://www.npmjs.com/package/react-dom
5. https://www.npmjs.com/package/@types/react
6. https://www.npmjs.com/package/@types/react-dom

[Redtigercod4]

Blocked by: #339

[Redtigercod4]

Following the issues surrounding PatternFly V6 migration, this is not possible in the near future.