Move format::desktop_entry to format::xdg::ini

format/xdg/ini/test_data/foo_full.desktop

@@ -0,0 +1,28 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=Foo Viewer
+GenericName=Foo Viewer
+GenericName[xx_XX.UTF-8]=Sneep glorp
+Comment=The best viewer for Foo objects available!
+TryExec=fooview
+Exec=fooview %F
+Icon=fooview
+MimeType=image/x-foo;
+Actions=Gallery;Create;
+OnlyShowIn=MATE;KDE;
+NotShowIn=GNOME
+Categories=Graphics;Utility
+Implements=com.example.Example;com.example.OtherExample
+Keywords=foo;image;view;viewer
+
+[Desktop Action Gallery]
+Exec=fooview --gallery
+Name=Browse Gallery
+
+[Desktop Action Create]
+Exec=fooview --create-new
+Name=Create a new Foo!
+Name[en_US]=Create a new Foo!
+Name[xx_XX.UTF-8]=Zweep zoop flooble glorp
+Icon=fooview-new