More dynamic rrule via ad

[dfdx]

No description provided.

[codecov-commenter]

Codecov Report

Merging #101 (532308a) into main (2ad0d21) will decrease coverage by 0.13%.
The diff coverage is 40.00%.

@@            Coverage Diff             @@
##             main     #101      +/-   ##
==========================================
- Coverage   79.35%   79.21%   -0.14%     
==========================================
  Files           7        7              
  Lines         431      433       +2     
==========================================
+ Hits          342      343       +1     
- Misses         89       90       +1     

Impacted Files	Coverage Δ
src/chainrules.jl	87.36% <40.00%> (-0.81%)	⬇️

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