[FEAT] Add provider support for Bitbucket

[dsphz]

Is your feature request related to a problem? Please describe.

Yes, the lack of explicit Bitbucket integration in the GitKraken CLI restricts the ability to create a PR from the tool. Describe the solution you'd like

I would like to see explicit and robust support for Bitbucket within the GitKraken CLI. This would ideally include:

Listing Bitbucket as a connected provider in the output of gk provider list --sync after connecting my Bitbucket account to GitKraken. Integration with Bitbucket pull requests, allowing for creation, pull requests directly from the CLI (similar to the AI PR generation feature for other platforms).

Describe alternatives you've considered

Currently, the alternative is to rely on switching between the GitKraken Desktop application and Bitbucket for different tasks.

Additional context

Many GitKraken users utilize Bitbucket for their version control needs. Providing first-class support for Bitbucket in the CLI would significantly enhance their workflow, offering the same level of integration and convenience that is currently enjoyed by users of other supported platforms. This would make the GitKraken CLI a more comprehensive and valuable tool for a wider range of developers and teams.

[JBUinfo]

Hi! In the latest version (3.0.4) we have added bitbucket support. It is not yet possible to create PRs but you can use workspaces and work items for your repositories. We will be adding more features as soon as possible.

Thank you very much!

[JBUinfo]

Hi! We have added the possibility to create PRs with Bitbucket in the latest version (3.0.7).

We truly appreciate your cooperation. We will proceed to close this issue. If you come across any other issues, feel free to contact us again.