clear user data when uninstall

[Tarrowren]

Pre-submit checks

• [X] I checked for similar issues beforehand, but could not find any. I could not add my proposal to any existing issue.
• [X] I am going to take the time to to fill in all the required details. I know that the bug report will be dismissed otherwise.

Feature description

I use the ~/.config/$APP_NAME directory to save user data, which I want the user to automatically clear when uninstalling.

Proposed solution

I would like AppImageLauncher to define a generic path as the user data dir, or configure the dirs when packaging the application as an AppImage and have AppImageLauncher read them and delete them when the user uninstalls

Alternative solutions you considered

No response

Additional context

No response