Introduce ColoringProblem

[gdalle]

• Merge column_coloring_detailed, row_coloring_detailed and symmetric_coloring_detailed into a single function coloring.
• Dispatch on the right version thanks to a new ColoringProblem{structure,partition,decompression} type, where structure in (:nonsymmetric, :symmetric), partition in (:column, :row, :bidirectional) and decompression in (:direct, :substitution).
• Adjust AbstractColoringResult and its subtypes to reflect the parameters of ColoringProblem.
• Isolate the code necessary for decompression into SparseMatrixCSC, so that other matrix types can be easily added.
• Update tests and docs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.20%. Comparing base (a0f516c) to head (ed3be14).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #45      +/-   ##
==========================================
+ Coverage   99.18%   99.20%   +0.02%     
==========================================
  Files           9       10       +1     
  Lines         366      377      +11     
==========================================
+ Hits          363      374      +11     
  Misses          3        3              

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