Add integration with Microsoft Teams (MS Teams)

Some customers would like to receive bitbucket events notifications (such as pull request created/updated, repository new commits, branch created/updated, etc) in their Microsoft Teams channels.

Currently, this is not possible using Bitbucket webhooks, because MS teams expect a different message format than the bitbucket webhook payload.

This feature request is to implement an integration with MS Teams channels - similar to Slack integration - so users can be notified in MS Team for a given event on their bitbucket repositories.