Fix FILE_TYPE_CHAR build error after CsWin32 update.

Author: alexrp

src/core/NativeMethods.txt

@@ -14,10 +14,10 @@ SetConsoleMode
 SetConsoleOutputCP
 WriteFile
 
+FILE_TYPE
 WIN32_ERROR
 
 CTRL_BREAK_EVENT
 CTRL_C_EVENT
 CTRL_CLOSE_EVENT
 CTRL_SHUTDOWN_EVENT
-FILE_TYPE_CHAR

src/core/Terminals/Windows/WindowsVirtualTerminal.cs

@@ -231,6 +231,6 @@ public override unsafe bool IsHandleValid(SafeHandle handle, bool write)
     public override bool IsHandleInteractive(SafeHandle handle)
     {
         // Note that this also returns true for invalid handles.
-        return GetFileType(handle) == FILE_TYPE_CHAR && GetConsoleMode(handle, out _);
+        return GetFileType(handle) == FILE_TYPE.FILE_TYPE_CHAR && GetConsoleMode(handle, out _);
     }
 }