ENH accelarate dicodile

[hndgzkn]

Improves dicodile's performance:

• Update signatures of functions adding seg_bounds and seg_inner_bounds to avoid unnecessary calls to Segmentation.get_seg_bounds.
• Separates worker and local segmentation classes.

[codecov]

Codecov Report

❌ Patch coverage is 95.16729% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.60%. Comparing base (8e5a75a) to head (24d414b).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
dicodile/utils/segmentation.py	95.80%	6 Missing ⚠️
dicodile/workers/dicod_worker.py	89.36%	5 Missing ⚠️
dicodile/update_z/coordinate_descent.py	80.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
+ Coverage   78.29%   78.60%   +0.30%     
==========================================
  Files          43       43              
  Lines        2856     2888      +32     
==========================================
+ Hits         2236     2270      +34     
+ Misses        620      618       -2     

Flag	Coverage Δ
unittests	78.60% <95.16%> (+0.30%)	⬆️

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