added desktop files

.local/share/applications/x-gnus.desktop

@@ -0,0 +1,12 @@
+[Desktop Entry]
+Name=Gnus (Emacs)
+GenericName=Mail Client
+Comment=Gnus' X handler
+MimeType=x-scheme-handler/mailto;
+Exec=emacsmail %F
+Icon=emacs
+Type=Application
+Terminal=false
+Categories=Network;Email;TextEditor;
+StartupWMClass=Emacs
+Keywords=Text;Editor;Email;Client;Gnus;