Start Work: show issues of Azure, Bitbucket and other providers

[sergeibbb]

This issue includes possible follow-ups of #3621

No need to do them all in one commit. Rather pick the most important from the list below and move others to another follow-up. Or, if you are ready to plan the whole roadmap, then just create a new issue for every item of the list below:

• support other providers:

  • GitLab: Start Work: Show GitLab issues #3779
  • Azure
  • Bitbucket?
  • ???

• on GIJ we let user to configure templates for branch naming, that support such fields as issuekey, summary, username, displayname, projectkey, sourcebranch

• we might want to let user configure default repository and default main branch for a specific project in issue management system.