Refactor VsProjectType to its own header

Move VsProject to its own header so that we can consolidate IsManaged
and IsCSharp.

Source/CMakeLists.txt

@@ -766,6 +766,7 @@ if (WIN32)
       cmGlobalVisualStudio9Generator.h
       cmVisualStudioGeneratorOptions.h
       cmVisualStudioGeneratorOptions.cxx
+      cmVsProjectType.h
       cmVisualStudio10TargetGenerator.h
       cmVisualStudio10TargetGenerator.cxx
       cmLocalVisualStudio10Generator.cxx

Source/cmVisualStudio10TargetGenerator.h

@@ -14,6 +14,7 @@
 #include <vector>
 
 #include "cmGeneratorTarget.h"
+#include "cmVsProjectType.h"
 
 class cmComputeLinkInformation;
 class cmCustomCommand;
@@ -211,11 +212,7 @@ private:
   OptionsMap LinkOptions;
   std::string LangForClCompile;
 
-  enum class VsProjectType
-  {
-    vcxproj,
-    csproj
-  } ProjectType;
+  VsProjectType ProjectType;
   bool InSourceBuild;
   std::vector<std::string> Configurations;
   std::vector<TargetsFileAndConfigs> TargetsFileAndConfigsVec;

Source/cmVsProjectType.h

@@ -0,0 +1,11 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+enum class VsProjectType
+{
+  vcxproj,
+  csproj
+};