feat(bitbucket): add Bitbucket support

[dark0dave]

Description

Add bitbucket integration.

Closes #566

Motivation and Context

Add bitbucket integration.

How Has This Been Tested?

Screenshots / Logs (if applicable)

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have formatted the code with rustfmt.
• I checked the lints with clippy.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 7.74648% with 131 lines in your changes are missing coverage. Please review.

Project coverage is 36.97%. Comparing base (2e1ed71) to head (674ae20).

Files	Patch %	Lines
git-cliff-core/src/remote/bitbucket.rs	0.00%	43 Missing ⚠️
git-cliff-core/src/remote/mod.rs	0.00%	32 Missing ⚠️
git-cliff-core/src/changelog.rs	27.78%	26 Missing ⚠️
git-cliff/src/lib.rs	0.00%	14 Missing ⚠️
git-cliff/src/logger.rs	0.00%	9 Missing ⚠️
git-cliff-core/src/remote/gitlab.rs	0.00%	4 Missing ⚠️
git-cliff-core/src/remote/github.rs	0.00%	2 Missing ⚠️
git-cliff-core/src/commit.rs	50.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #663      +/-   ##
==========================================
- Coverage   39.97%   36.97%   -3.00%     
==========================================
  Files          17       18       +1     
  Lines        1221     1350     +129     
==========================================
+ Hits          488      499      +11     
- Misses        733      851     +118     

Flag	Coverage Δ
unit-tests	36.97% <7.75%> (-3.00%)	⬇️

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[orhun]

I created a repo for test fixtures: https://bitbucket.org/orhunp/git-cliff-readme-example

[dark0dave]

I created a repo for test fixtures: https://bitbucket.org/orhunp/git-cliff-readme-example

Big thanks, I was going to have to do that!

[orhun]

How is this looking? I think I'm gonna release a new version on Monday so it would be nice to get this in :D

[dark0dave]

@orhun still fixing some bugs, bitbucket has weird author structure.

[orhun]

🚀🚀🚀

[welcome]

Congrats on merging your first pull request! ⛰️