Reorganize CategoricalAlgebra file structure #955
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This PR is the first step towards an upcoming refactor which makes zero changes to any of the code other than changing the directory structure in order to make future diffs more meaningful. The tests are completely unchanged while
src
is changed to showcase this. The last commit does not changesrc
while it restructurestests
.Categorical algebra is split into four parts, "BasicSets" (for (Fin)Sets, (Fin)Functions, not considered in any sort of category), then three levels of
CategoricalAlgebra
: "Cats" (categories in the abstract) "SetCats" (things involving Set-like categories, including (co)limits), and "Pointwise" (C-Set-like content).