Add support for csharp-netcore clients

Updates the static list of available client SDK generators to include csharp-netcore as per issue [#2481](eclipse-archived/codewind#2481)

Signed-off-by: William Marshall <62070150+BinaryWizard904@users.noreply.github.com>

Author: marshallwp

dev/org.eclipse.codewind.openapi.ui/src/org/eclipse/codewind/openapi/ui/Constants.java

@@ -50,7 +50,7 @@ public static enum PROJECT_TYPE { MAVEN, NODEJS, GO, NOT_ASSESSED, UNKNOWN};
         {"Apex", "apex"},
         {"Bash", "bash"},
         {"C", "c"},
-        {"C#", "csharp", "csharp-dotnet2", "csharp-refactor"},
+        {"C#", "csharp", "csharp-dotnet2", "csharp-refactor", "csharp-netcore"},
         {"C++", "cpp-qt5", "cpp-restsdk", "cpp-tizen"},
         {"Dart", "dart", "dart-jaguar"},
         {"Eiffel", "eiffel"},