fake_contacts: first submit, lint and rewritemeta fail

First submit of a new app I've written myself, called "Fake Contacts".

Source is on GitHub; it builds in Android Studio and runs on Android. Written in Flutter and Dart.

YML file for F-Droid passes "fdroid readmeta", but "fdroid lint" seems to not like a category I chose from the list, and crashes on a version number. "fdroid rewritemeta" crashes and wipes out my YML file completely. I tried to use the "App Inclusion" template and didn't understand most of the stuff in it.

This is my first phone app and first time submitting to F-Droid, sorry for any mistakes. Thanks.