chore: Add Tailwind setup instructions for v3 and v4 to README

[tuanphung2308]

Reasons for making this change

Updated README.md to include configuration steps for integrating Tailwind v3 and v4 with the package. This ensures users can correctly set up Tailwind for compatibility with RJSF and shadCN components.

fixes #[4633]

Checklist

• I'm updating documentation
  • I've checked the rendering of the Markdown text I've added
• I'm adding or updating code
  • I've added and/or updated tests. I've run npx nx run-many --target=build --exclude=@rjsf/docs && npm run test:update to update snapshots, if needed.
  • I've updated docs if needed
  • I've updated the changelog with a description of the PR
• I'm adding a new feature
  • I've updated the playground with an example use of the feature