Force fields to have same eltype

[albertomercurio]

Fixes #10.

There are still some problems with Reactant.jl though.

[github-actions]

🤖 Hi @albertomercurio, I've received your request, and I'm working on it now! You can track my progress in the logs for more details.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.40%. Comparing base (862b4d5) to head (a8875c4).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #28      +/-   ##
==========================================
- Coverage   82.64%   82.40%   -0.25%     
==========================================
  Files          14       13       -1     
  Lines         801      773      -28     
==========================================
- Hits          662      637      -25     
+ Misses        139      136       -3     

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[github-actions]

📋 Review Summary

This pull request improves type stability by enforcing element type consistency in the sparse array constructors. The removal of Reactant.jl support is also noted. The changes are generally good, but there are a few minor suggestions for improving consistency and readability.

🔍 General Feedback

• The use of copy in the constructors is inconsistent across the different sparse matrix types. It's recommended to make this behavior consistent.
• The docstrings for the sparse matrix types could be simplified for better readability.

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'Benchmark Results'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.30.

Benchmark suite	Current: a8875c4	Previous: c26f8a5	Ratio
Sparse Vector/JLArray/Sum	22782 ns	16145.5 ns	1.41
Kronecker Product/Array/CSC	539683 ns	407425 ns	1.32

This comment was automatically generated by workflow using github-action-benchmark.

[gdalle]

Would this be enough to get Reactant working?

[albertomercurio]

Unfortunately the type relaxation didn't help.