Recursive array tools support

[SouthEndMusic]

Fixes #237.

[SouthEndMusic]

@adrhill I implemented trace_input methods in an extension and these are indeed triggered in my test, but the error remains

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 60.05%. Comparing base (dfb4c7c) to head (740c032).

Files with missing lines	Patch %	Lines
.../SparseConnectivityTracerRecursiveArrayToolsExt.jl	0.00%	7 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (dfb4c7c) and HEAD (740c032). Click for more details.

HEAD has 12 uploads less than BASE

Flag	BASE (dfb4c7c)	HEAD (740c032)
	18	6

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #238       +/-   ##
===========================================
- Coverage   93.82%   60.05%   -33.78%     
===========================================
  Files          30       31        +1     
  Lines        1183     1154       -29     
===========================================
- Hits         1110      693      -417     
- Misses         73      461      +388     

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[SouthEndMusic]

Hmm it looks like the problem is that e.g.

using RecursiveArrayTools
u = NamedArrayPartition(; foo=rand(5))
similar(u, Int)

yields the output

5-element Vector{Int64}:
                   0
 9223372036854775807
                  13
                   0
                  -1

SciML/RecursiveArrayTools.jl#430

[adrhill]

Looks like this is missing from the test environment.

[adrhill]

Would be nice to have a slightly more rigorous test than just a dry-run.

I don't know the functionality of NamedArrayPartition, but the tests should cover as much of it as possible.

[adrhill]

So ArrayPartition are always flat vectors? Does this support scalar values, e.g. ArrayPartition(rand(2,2), 1.0, rand(3))?

[SouthEndMusic]

Closing this PR as this was fixed by SciML/RecursiveArrayTools.jl#431.