Add Restoid

[hddq]

Source code: https://github.com/hddq/restoid
F-Droid: waiting for first build, metadata already merged - https://gitlab.com/fdroid/fdroiddata/-/commit/d58d00eaafd86d27072d8e168b633c6a634fceb1

[offa]

Thanks for your suggestion and project! 😃

Let's wait for the F-Droid link to become active so we can add both links together.