feat: Update to latest xunit.v3

[Cheesebaron]

GitHub Issue: closes #

PR Type:

• ✨ Feature
• 🏗️ Build or CI related changes

What is the current behavior? 🤔

Using old xUnit v2 and dotnet test to run

What is the new behavior? 🚀

Updated to xUnit.v3 and Microsoft.Testing.Platform Updated TFM on the Unit Test suite to .NET 9

PR Checklist ✅

Please check if your PR fulfills the following requirements:

• [x] 📝 Commits must be following the Conventional Commits specification.
• [ ] 🧪 Added Runtime tests, UI tests, or a manual test sample for the changes have been added (for bug fixes / features) (if applicable)
• [ ] 📚 Docs have been added/updated which fit documentation template (for bug fixes / features)
• [ ] 🖼️ Validated PR Screenshots Compare Test Run results.
• [ ] ❗ Contains NO breaking changes

Other information ℹ️

[DevTKSS]

@Cheesebaron should the either way changed tfm be updated meanwhile to net10.0 should be a quick one 👍