Switch over to FunctionImplementations.jl

[mtfishman]

Closes #193, closes #194.

[codecov]

Codecov Report

❌ Patch coverage is 77.07006% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.91%. Comparing base (a52e335) to head (37c0a86).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...locksparsearray/wrappedabstractblocksparsearray.jl	81.25%	6 Missing ⚠️
src/abstractblocksparsearray/map.jl	70.58%	5 Missing ⚠️
...ksparsearrayinterface/blocksparsearrayinterface.jl	83.33%	5 Missing ⚠️
src/blocksparsearrayinterface/broadcast.jl	83.87%	5 Missing ⚠️
src/abstractblocksparsearray/broadcast.jl	72.72%	3 Missing ⚠️
src/abstractblocksparsearray/views.jl	0.00%	3 Missing ⚠️
src/abstractblocksparsearray/unblockedsubarray.jl	77.77%	2 Missing ⚠️
src/blocksparsearrayinterface/arraylayouts.jl	66.66%	2 Missing ⚠️
src/blocksparsearrayinterface/map.jl	80.00%	2 Missing ⚠️
src/blocksparsearray/blockdiagonalarray.jl	0.00%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #195      +/-   ##
==========================================
+ Coverage   71.69%   71.91%   +0.21%     
==========================================
  Files          36       36              
  Lines        2035     2026       -9     
==========================================
- Hits         1459     1457       -2     
+ Misses        576      569       -7     

Flag	Coverage Δ
docs	5.84% <11.25%> (-0.09%)	⬇️

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