[DOP-16662] Add Kafka consumer based on FastStream

[dolfinus]

Change Summary

• Added consumer extras with FastStream dependency
• Added arrakis.consumer module with structure similar to arrakis.server
• Added Kafka container & volume to docker-compose.yml
• Added tests and documentation for consumer.

Related issue number

Checklist

• Commit message and PR title is comprehensive
• Keep the change as small as possible
• Unit and integration tests for the changes exist
• Tests pass on CI and coverage does not decrease
• Documentation reflects the changes where applicable
• docs/changelog/next_release/<pull request or issue id>.<change type>.rst file added describing change
  (see CONTRIBUTING.rst for details.)
• My PR is ready to review.

[codecov]

Codecov Report

Attention: Patch coverage is 78.26087% with 15 lines in your changes missing coverage. Please review.

Project coverage is 83.62%. Comparing base (861e18e) to head (903cbee).

Files	Patch %	Lines
arrakis/consumer/settings/security.py	59.25%	6 Missing and 5 partials ⚠️
arrakis/consumer/__init__.py	78.94%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop       #7      +/-   ##
===========================================
- Coverage    84.10%   83.62%   -0.48%     
===========================================
  Files           61       66       +5     
  Lines          780      849      +69     
  Branches        33       45      +12     
===========================================
+ Hits           656      710      +54     
- Misses         114      124      +10     
- Partials        10       15       +5     

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