Add Contributor Covenant Code of Conduct, re-sync READMEs

4 jobs for wip/coc in 18 minutes and 48 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #395274
ubuntu

00:03:17

 
  Test
passed #395275
flatpak

00:14:01

 
  Deploy
passed #395276
review

00:00:32

passed #395277
allowed to fail manual
stop_review

00:00:57