Add initial integration test famework and IMAP client session tests

5 jobs for wip/integration-tests in 26 minutes and 15 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #258784
fedora

00:08:10

passed #258785
ubuntu

00:09:25

 
  Test
passed #258786
flatpak

00:15:28

 
  Deploy
passed #258787
review

00:00:26

passed #258788
allowed to fail manual
stop_review

00:00:53