Proper Orthogonal Decomposition (POD) method

[bowenszhu]

resolve #2

[codecov]

Codecov Report

Merging #18 (8ce002e) into main (020f782) will increase coverage by 100.00%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           main       #18        +/-   ##
===========================================
+ Coverage      0   100.00%   +100.00%     
===========================================
  Files         0         1         +1     
  Lines         0         6         +6     
===========================================
+ Hits          0         6         +6     

Impacted Files	Coverage Δ
src/proper_orthogonal_decomposition.jl	100.00% <100.00%> (ø)

📣 Codecov can now indicate which changes are the most critical in Pull Requests. Learn more

[FHoltorf]

This is a really neat example! I like it a lot. We should certainly keep it and see if we can expand on it by building the infrastructure to generate a POD-based Petrov-Galerkin model.