Add Windows app, zip download and SignPath signing

.signpath/artifact-configurations/default.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<artifact-configuration xmlns="http://signpath.io/artifact-configuration/v1">
+  <zip-file>
+    <pe-file path="SotfModLoader.exe" product-name="Sons of the Forest Mod Loader">
+      <authenticode-sign />
+    </pe-file>
+  </zip-file>
+</artifact-configuration>