[Merged by Bors] - feat(Algebra/Homology): API for the computation of the homology of homological complexes #8845
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This PR introduces more homology API in order to ease the computation of group cohomology in low degrees #8802. The main definition
HomologicalComplex.homologyIsoSc' : K.homology j ≅ (K.sc' i j k).homology
relates the homology of a complexK
in degreej
to the homology of a short complexK.X i ⟶ K.X j ⟶ K.X k
wheni
andk
are degrees which appear respectively beforej
and afterj
.