TypeCatalogGen

./build.sh runs the Core PowerShell TypeCatalogGen.exe under Mono on Linux (using dotnet-cli). The Runtime folder is a facade project that, when published, produces a list of the currently used runtime assemblies for .NET Core. The output is CorePsTypeCatalog.cs, which contains an "initialized" dictionary that we copy into typecatalog.cs of System.Management.Automation