Migrate to React 18

[mirekys]

❤️ Thank you for your contribution!

Description

Migrate react-searchkit from React 16 to React 18 following RFC inveniosoftware/rfcs#112.

• Upgrades peer dependencies
• Replaces enzyme adapter for React18 suppoort
• Removes explicit React imports (update-react-imports codemod)
• Migrates render-only class components to functions (pure-component codemod)
• Updates demo entry points to createRoot (update-react-imports codemod)
• Applies formatting for React 18
• Switches CI to unified workflows from https://github.com/inveniosoftware/workflows
• Bumped Node - now supporting v22, 24, (26?)

Prerequisites

To make React 18 linting work, you need to link a local clone of eslint-config-invenio:

gh repo clone inveniosoftware/eslint-config-invenio
gh pr checkout 20
cd eslint-config-invenio
npm link

In this repo:

npm link @inveniosoftware/eslint-config-invenio

• All demos works as before without changes
• All tests pass
• npm audit down to just 2 moderate severity vulnerabilities (due to webpack-dev-server - didn't manage to solve that one)

Requires:

• config: add React 18 ESLint configuration eslint-config-invenio#20 (must be merged & released first)
• feat(tests-js): support custom run-js-tests.sh script workflows#26

Part of: inveniosoftware/rfcs#112

Checklist

Ticks in all boxes and 🟢 on all GitHub actions status checks are required to merge:

• I'm aware of the code of conduct.
• I've created logical separate commits and followed the commit message format.
• I've added relevant test cases.
• I've added relevant documentation.
• I've marked translation strings.
• I've identified the copyright holder(s) and updated copyright headers for touched files (>15 lines contributions).
• I've NOT included third-party code (copy/pasted source code or new dependencies).
  • If you have added third-party code (copy/pasted or new dependencies), please reach out to an architect on Discord.

Frontend

• I've followed the CSS/JS and React guidelines.
• I've followed the web accessibility guidelines.
• I've followed the user interface guidelines.