chore: commit missing files

PcgsInv/app.manifest

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+    <!-- This manifest is used on Windows only.
+         Don't remove it as it might cause problems with window transparency and embedded controls.
+         For more details visit https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests -->
+    <assemblyIdentity version="1.0.0.0" name="PcgsInv.Desktop"/>
+
+    <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+        <application>
+            <!-- A list of the Windows versions that this application has been tested on
+                 and is designed to work with. Uncomment the appropriate elements
+                 and Windows will automatically select the most compatible environment. -->
+
+            <!-- Windows 10 -->
+            <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+        </application>
+    </compatibility>
+</assembly>