feat: Adding Interpolation class

[andrsd]

This wraps DMInterpolation machinery.

[codecov]

Codecov Report

Attention: Patch coverage is 82.69231% with 9 lines in your changes missing coverage. Please review.

Project coverage is 86.37%. Comparing base (86e1cf1) to head (2bb440f).

Files with missing lines	Patch %	Lines
src/Interpolation.cpp	82.69%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #675      +/-   ##
==========================================
- Coverage   86.38%   86.37%   -0.02%     
==========================================
  Files         189      190       +1     
  Lines       12752    12804      +52     
==========================================
+ Hits        11016    11059      +43     
- Misses       1736     1745       +9     

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