Refactor tracer types

[adrhill]

Closes #40 by updating tracers to parametric signatures

• ConnectivityTracer{I,S}
• JacobianTracer{I,S}
• HessianTracer{I,S,D}

Where I is the index type, S is a (pseudo-)set type and D is an AbstractDict{I,S}.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 51.81818% with 53 lines in your changes are missing coverage. Please review.

Project coverage is 70.62%. Comparing base (2fcd730) to head (5f033bf).

Files	Patch %	Lines
src/tracers.jl	64.70%	12 Missing ⚠️
src/settypes/recursiveset.jl	33.33%	10 Missing ⚠️
src/settypes/sortedvector.jl	33.33%	10 Missing ⚠️
src/settypes/base_sets.jl	47.05%	9 Missing ⚠️
src/settypes/duplicatevector.jl	33.33%	8 Missing ⚠️
src/conversion.jl	66.66%	2 Missing ⚠️
src/pattern.jl	81.81%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #53      +/-   ##
==========================================
- Coverage   71.35%   70.62%   -0.73%     
==========================================
  Files          11       12       +1     
  Lines         398      429      +31     
==========================================
+ Hits          284      303      +19     
- Misses        114      126      +12     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[adrhill]

Merging for now, will be changed in #57.