Update examples, readme and remove old version

[AlexFrid]

Thank you for submitting this pull request! We appreciate you spending the time to work on these changes.

What is the motivation?

Making things ready for moving out of beta, with updated docs and examples reflected in the SurrealDB documentation

Type of Change

• [x] 📚 Examples / docs / tutorials / dependencies update
• [ ] 🔧 Bug fix (non-breaking change which fixes an issue)
• [ ] 🥂 Improvement (non-breaking change which improves an existing feature)
• [ ] 🚀 New feature (non-breaking change which adds functionality)
• [ ] 💥 Breaking change (fix or feature that would cause existing functionality to change)
• [ ] 🔐 Security fix

What does this change do?

• remove old code that is no longer in use
• update examples
• update readme

What is your testing strategy?

Manually tested examples, no code changes done to the code otherwise so no testing needed there.

Is this related to any issues?

no

Have you read the Contributing Guidelines?

• [x] I have read the Contributing Guidelines