Add Bitbucket integration support #3916
Description
Add full support for Bitbucket integration -- prs, issues, and autolinks (launchpad, start work, etc.)
Resolves #3333 , related (azure) #3902
Roadmap
- connection flow, "home" button: Bitbucket Cloud: Set Up Auth Provider and Basic Integration #4044
- check that prs, issues and autolinks work (make them working): Bitbucket Cloud: Add Home PR/Issue Support #4045
- launchpad: Bitbucket Cloud: Add Launchpad Support #4046
- start work: Bitbucket Cloud: Add Start Work Support #4047
- Bitbucket Server: Bitbucket Server #4107
Follow-ups:
- search in Launchpad: Bitbucket: Search in Launchpad #4106
- ...