Base windows UI is working.

* No joining/leaving networks yet, but they do display.
* Nothing is updated yet after first load of the app.  Need to set up a background task to run updates.

windows/WinUI/ZeroTierStatus.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WinUI
+{
+    public class ZeroTierStatus
+    {
+        public string address;
+        public string publicIdentity;
+        public bool online;
+        public bool tcpFallbackActive;
+        public int versionMajor;
+        public int versionMinor;
+        public int versionRev;
+        public string version;
+        public UInt64 clock;
+    }
+}