Dev Container - Dotnet commands

Command Description
dotnet new sln -n <Solution Name> Create a new solution
dotnet new classlib -n Api Create a classlib csproj
dotnet new xunit -n Api.Tests Create an xunit csproj
dotnet sln add Api
dotnet sln add Api.Tests
Add csproj to solution
dotnet add Api.Tests/Api.Tests.csproj reference Api/Api.csproj Add reference of a csproj to another