feat: Make simple types of repartition

[martindurant]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 92.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 93.03%. Comparing base (8cb8994) to head (21eca16).
Report is 92 commits behind head on main.

Files	Patch %	Lines
src/dask_awkward/lib/core.py	92.00%	2 Missing ⚠️
src/dask_awkward/lib/structure.py	93.54%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #512      +/-   ##
==========================================
- Coverage   93.06%   93.03%   -0.04%     
==========================================
  Files          23       23              
  Lines        3290     3372      +82     
==========================================
+ Hits         3062     3137      +75     
- Misses        228      235       +7     

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