Noncontiguous slicing

[mtfishman]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 10 lines in your changes missing coverage. Please review.

Project coverage is 73.90%. Comparing base (9eb742b) to head (38782d8).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/abstractblocksparsearray/unblockedsubarray.jl	81.81%	6 Missing ⚠️
src/BlockArraysExtensions/BlockArraysExtensions.jl	60.00%	2 Missing ⚠️
src/abstractblocksparsearray/arraylayouts.jl	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #116      +/-   ##
==========================================
+ Coverage   73.27%   73.90%   +0.63%     
==========================================
  Files          28       29       +1     
  Lines        1216     1261      +45     
==========================================
+ Hits          891      932      +41     
- Misses        325      329       +4     

Flag	Coverage Δ
docs	11.85% <2.00%> (-0.45%)	⬇️

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[mtfishman]

This is a little bit hacky but fixes some bugs and doesn't require modifying other code much.

At some point we should probably go through the slicing/SubArray logic more holistically and try to clean it up (in particular, I think we can be more systematic about how we distinguish between blockwise vs. non-blockwise slices).