After game installation there is no 0 A.D. shortcut on the desktop

[kvg]

Most of games have shortcut on the desktop.

[historic_bruno]

I think it's a good idea, the main question is where to put the option. I'm not sure we can modify the standard setup pages (Install location / Start menu folder), so we could either add a new page just for the desktop icon or hijack the "readme" option on the Finish page as described ​here (that does feel like a hack though). Either way I think it should be unchecked by default. We also need to make sure the uninstaller cleans it up correctly afterward.

[wraitii]

In 24353:

More improvements to the release scripts.

• Add a 'dev' option to the mac bundle that's much faster, intended to quickly test bundle-like behaviour.
• Add an option to only archive the 'mod' folder, intended to speed up the CI weekly builds and avoid taking too much disk

space.

• Tweak the windows installer, add an option to create a shortcut to the desktop (Fixes #1637). This uses the readme 'hack' which appears to be a relatively standard way of doing that.
• Make the scripts executable.
• Update jenkinsfile.

Follows rP24343

Differential Revision: ​https://code.wildfiregames.com/D3191