Implemented R's split() utility to split a sequence by a grouping factor.

[LTLA]

…tor.

[codecov]

Codecov Report

❌ Patch coverage is 96.07843% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.94%. Comparing base (5a0d12d) to head (25cb182).

Files with missing lines	Patch %	Lines
src/biocutils/split.py	96.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   90.80%   90.94%   +0.14%     
==========================================
  Files          42       43       +1     
  Lines        1783     1834      +51     
  Branches      358      374      +16     
==========================================
+ Hits         1619     1668      +49     
- Misses        113      114       +1     
- Partials       51       52       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[LTLA]

Best leave compressed_list out of this: (i) avoid cyclic dependency on compressed-lists, (ii) compressed-lists already has split_as_compressed_list(), and (iii) split() and splitAsList() are separate functions in R anyway.