- Add @yangqiao -- who wrote a significant part of the Objective-C backend code through GSoC 2014 -- to the authors list. 
- Add link to 2014 codebase (maintained by `@wxiao` to README)

## Note on Rewriting History

The original intention is to re-introduce commits from 2014 as a part of this project's history, but so far there has been no progress, so it's unlikely that we'll move forward with such drastic change anytime soon. The approach is now archived at https://invent.kde.org/network/kdeconnect-ios/-/wikis/Random-Notes#rewriting-history