[javiergs]

Summary

Align the README with the shared Getting Started layout: title and badges, short introduction, hero image, requirements, quick start, Maven dependency, examples, API reference, and troubleshooting. Keep technology-specific safety, credentials, licensing, and maturity notes where appropriate.

Key changes

• Reduce duplicated setup instructions and route detailed steps to existing student guides.
• Keep published Maven versions and runnable commands unchanged.
• Fix or remove obsolete links to root-level CONTRIBUTING.md after its relocation to .github/.
• Remove unnecessary references to private implementation repositories.
• Preserve RTDE4J's limited RTDE streaming scope, Turtle4J's simulator-versus-hardware distinction, Cortex4J's credentials/entitlements, and TULIP's destructive Taiga example warnings.

Documentation-only; no source code, dependency, CI, or branch protection changes.