Mark as COSMIC application

Author: jackpot51

res/com.system76.CosmicFiles.metainfo.xml

@@ -16,6 +16,7 @@
   <launchable type="desktop-id">com.system76.CosmicFiles.desktop</launchable>
   <icon type="remote" height="256" width="256">https://raw.githubusercontent.com/pop-os/cosmic-files/master/res/icons/hicolor/256x256/apps/com.system76.CosmicFiles.svg</icon>
   <provides>
+    <id>com.system76.CosmicApplication</id>
     <mimetypes>
       <mimetype>inode/directory</mimetype>
     </mimetypes>