Release 9.2.0-beta.1 with .NET 8.0 Support

This is a release which removes the .NET 6.0 Target Frameworks as they are out of support. MvvmCross now targets .NET 7.0 and .NET 8.0.

What's Changed

• Bump the dev-dependencies group with 3 updates by @dependabot in #4663
• Bump Roslynator.Analyzers from 4.3.0 to 4.4.0 by @dependabot in #4664
• Bump SonarAnalyzer.CSharp from 9.6.0.74858 to 9.7.0.75501 by @dependabot in #4667
• Bump Microsoft.NET.Test.Sdk from 17.6.3 to 17.7.0 by @dependabot in #4668
• Update to .NET 7 by @Cheesebaron in #4673
• Remove registered callback from IoCProvider by @Cheesebaron in #4674
• Bump dotnet-reportgenerator-globaltool from 5.1.23 to 5.1.24 by @dependabot in #4675
• Bump dotnet-sonarscanner from 5.13.0 to 5.13.1 by @dependabot in #4676
• Bump Microsoft.NET.Test.Sdk from 17.7.0 to 17.7.1 by @dependabot in #4677
• Bump SonarAnalyzer.CSharp from 9.7.0.75501 to 9.8.0.76515 by @dependabot in #4678
• Update readme.txt to reflect the new Starter sample. by @JimWilcox3 in #4681
• Bump Microsoft.WindowsAppSDK from 1.3.230724000 to 1.4.230822000 by @dependabot in #4686
• Bump Microsoft.NET.Test.Sdk from 17.7.1 to 17.7.2 by @dependabot in #4684
• Bump Microsoft.CodeAnalysis.NetAnalyzers from 7.0.3 to 7.0.4 by @dependabot in #4683
• Bump Roslynator.Analyzers from 4.4.0 to 4.5.0 by @dependabot in #4682
• Add .NET8.0 support by @Cheesebaron in #4691
• Bump dotnet-reportgenerator-globaltool from 5.1.24 to 5.1.25 by @dependabot in #4688
• Bump SonarAnalyzer.CSharp from 9.8.0.76515 to 9.9.0.77355 by @dependabot in #4689

Full Changelog: 9.1.1...9.2.0-beta.1