Add Windows app, zip download and SignPath signing

app/Models.cs

@@ -0,0 +1,50 @@
+using System.Collections.Generic;
+
+namespace SotfModLoader
+{
+    public class PackageFile
+    {
+        public string path { get; set; }
+        public long size { get; set; }
+    }
+
+    public class Package
+    {
+        public string id { get; set; }
+        public string name { get; set; }
+        public string description { get; set; }
+        public string version { get; set; }
+        public string platform { get; set; }
+        public string repo { get; set; }
+        public string releaseUrl { get; set; }
+        public string downloadUrl { get; set; }
+        public string @base { get; set; }
+        public string dll { get; set; }
+        public string manifestPath { get; set; }
+        public long? downloads { get; set; }
+        public List<string> roots { get; set; }
+        public List<PackageFile> files { get; set; }
+    }
+
+    public class AppInfo
+    {
+        public string version { get; set; }
+        public string url { get; set; }
+    }
+
+    public class Manifest
+    {
+        public string generated { get; set; }
+        public string owner { get; set; }
+        public Package redloader { get; set; }
+        public List<Package> mods { get; set; }
+        public AppInfo app { get; set; }
+    }
+
+    public class ModStatus
+    {
+        public bool Installed { get; set; }
+        public string Version { get; set; }
+        public bool Current { get; set; }
+    }
+}