Implement Dual Matrix with 2nd order example

[max-vassili3v]

NOTE: This PR branches from and is dependent on #28

This PR Implements DualMatrix using the Tensor wrapper. Functionality is added such that DualMatrix is able to be used in order to do 2nd order automatic differentiation, and an example of this is added.

[codecov]

Codecov Report

❌ Patch coverage is 98.30508% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.40%. Comparing base (5761344) to head (97f5005).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/types.jl	96.15%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #29       +/-   ##
===========================================
+ Coverage   70.87%   91.40%   +20.52%     
===========================================
  Files           5        5               
  Lines         103      221      +118     
===========================================
+ Hits           73      202      +129     
+ Misses         30       19       -11     

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