porting shell from nuget to local

src/Shared/Microsoft.Windows.Shell/Standard/MOUSEINPUT.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace Standard
+{
+	internal struct MOUSEINPUT
+	{
+		public int dx;
+
+		public int dy;
+
+		public int mouseData;
+
+		public int dwFlags;
+
+		public int time;
+
+		public IntPtr dwExtraInfo;
+	}
+}