some work on assemblers to allow for non static array props and some …

[cmhamel]

…initial work for sparsity patterns for vectors.

[codecov]

Codecov Report

❌ Patch coverage is 96.96970% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.90%. Comparing base (5073016) to head (7bae3d0).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/assemblers/Assemblers.jl	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #202      +/-   ##
==========================================
+ Coverage   73.78%   73.90%   +0.12%     
==========================================
  Files          48       48              
  Lines        2132     2150      +18     
==========================================
+ Hits         1573     1589      +16     
- Misses        559      561       +2     

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