feat: setup window using the api

Packages/AppWindowUtility/package.json

@@ -0,0 +1,13 @@
+{
+    "name": "com.sator-imaging.app-window-utility",
+    "displayName": "App Window Utility",
+    "version": "1.0.0",
+    "unity": "2018.3",
+    "description": "Utility for configuring application window style. With this utility, you can make application window transparent, frameless and more.\n\nCopyright (c) 2021 Sator Imaging, all rights reserved.",
+
+    "author": {
+        "name": "Sator Imaging",
+        "url": "https://www.sator-imaging.com/"
+    }
+
+}