feat: parallel intra strided-rolling

[jvdd]

Closes #98

• write tests
• profile code
• heuristic for chunk size
  -> additional info: https://stackoverflow.com/questions/3822512/chunksize-parameter-in-multiprocessing-pool-map

[codecov-commenter]

Codecov Report

❌ Patch coverage is 93.33333% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.74%. Comparing base (00c37eb) to head (17c5a23).
⚠️ Report is 36 commits behind head on main.

Files with missing lines	Patch %	Lines
tsflex/features/segmenter/strided_rolling.py	78.57%	3 Missing ⚠️
tsflex/features/feature_collection.py	97.67%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #102      +/-   ##
==========================================
- Coverage   97.91%   97.74%   -0.18%     
==========================================
  Files          23       23              
  Lines        1247     1284      +37     
==========================================
+ Hits         1221     1255      +34     
- Misses         26       29       +3     

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