The Azos nuget packaging must suport linux-x64 and win-x64 natively; also Azos and Web should target NS21

[itadapter]

Figure out multiple runtime identifier build steps: Look like this does the job:

# just repeat the command in you build script with different runtime ids
$ dotnet build x\y\z.csproj -r win-x64
$ dotnet build x\y\z.csproj -r linux-x64