Improve class structure

[ulgens]

Supersedes #23

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (ce01688) to head (6fcc325).
⚠️ Report is 3 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #27   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            7         7           
  Lines          567       579   +12     
  Branches        30        31    +1     
=========================================
+ Hits           567       579   +12     

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[Copilot]

Pull request overview

This PR refactors the class structure of the formatters module by introducing a base class abstraction and changing how BlackFormatter is initialized.

Key Changes:

• Introduced BaseProcessor base class that extracts common formatting logic from BlackFormatter
• Changed BlackFormatter API from accepting a Mode parameter to accepting individual formatting options
• Updated all test cases to use the new parameterless Formatter() constructor instead of Formatter(mode=BLACK_MODE)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/ruffen_docs/formatters.py	Introduces BaseProcessor base class with abstract process_code_block method and refactors BlackFormatter to extend it, accepting individual Mode parameters instead of a Mode object
src/ruffen_docs/init.py	Removes direct black import and updates BlackFormatter instantiation to pass formatter options as keyword arguments instead of creating a Mode object
tests/test_ruffen_docs.py	Updates all 60+ test cases to instantiate Formatter without the mode parameter, relying on default values

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