The list of options command.Options.Where(o => o is IForwardedOption) does not include -bl msbuild option, while it does include --property msbuild option:

dotnet watch needs to forward this option to dotnet build instead of forwarding it to the application.

We should:

• check the documentation for MSBuild's binlog option
• create a structure to hold the data encoded in the argument
• add a field to the MSBuildArgs struct for holding all MSBuild args
• Create a System.CommandLine option for the -bl arg and apply it to all Commands that forward to MSBuild today
• add the parsing of this field via the new option to the MSBuildArgs parsing function
• make sure that the MSBuildForwardingApp forwards the '-bl' argument when calling actual MSbuild.