Add .slnx file for .NET 9+ compatibility alongside existing .sln file#162

BenjaminMichaelis merged 2 commits intomainIntelliTect/Multitool:mainfrom

copilot/fix-6bf18e0f-95d7-4218-b175-65cf97597d16IntelliTect/Multitool:copilot/fix-6bf18e0f-95d7-4218-b175-65cf97597d16Copy head branch name to clipboard