[Docs] Added RTL section to CodeSetup.md

[mobinseven]

Pull Request

📖 Description

This PR is about adding a section to the CodeSetup page of the documentation containing information to guide users to configure FluentUI for Right-to-Left languages.

🎫 Issues

#2121

✅ Checklist

• I have read the CONTRIBUTING documentation and followed the standards for this project.

[mobinseven]

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