feat(AlgebraicTopology): simplicial homology

[joelriou]

This PRs add some API for simplicial homology, the homology of simplicial sets.

---

[github-actions]

PR summary 1ba90ab6bb

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.AlgebraicTopology.SingularHomology.HomotopyInvariance	-1707
Mathlib.AlgebraicTopology.SingularHomology.Basic Mathlib.AlgebraicTopology.SingularHomology.HomotopyInvarianceTopCat	1
Mathlib.AlgebraicTopology.SimplicialSet.Homology.Basic (new file)	1086
Mathlib.AlgebraicTopology.SimplicialSet.Homology.HomotopyInvariance	1137

---

Declarations diff

+ chainComplex
+ chainComplexFunctor
+ chainComplexFunctorAdjunction
+ chainComplexXCofan
+ chainComplex_hom_ext
+ congr_homologyMap
+ congr_sSetHomologyMap
+ homology
+ homologyFunctor
+ homologyMap
+ homologyMap_comp
+ homologyMap_id
+ instance : (chainComplexFunctor C).Additive := by
+ isColimitChainComplexXCofan
+ sSetChainComplexMap
+ ιChainComplex
+ ιChainComplex_d
+ ι_chainComplexMap_f
++ chainComplexMap
++-- congr_homologyMap_singularChainComplexFunctor
++-- singularChainComplexFunctorObjMap
- SSet.singularChainComplexFunctor
- SSet.singularChainComplexFunctorAdjunction
- instance : (SSet.singularChainComplexFunctor C).Additive := by

You can run this locally as follows

## summary with just the declaration names:
./scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh contains some details about this script.

---

Increase in tech debt: (relative, absolute) = (1.00, 0.00)

Current number	Change	Type
6872	1	backward.isDefEq.respectTransparency

Current commit d6299e2d6e
Reference commit 1ba90ab6bb

You can run this locally as

./scripts/reporting/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

---

note: file Mathlib/AlgebraicTopology/SingularHomology/HomotopyInvariance.lean` was renamed to `Mathlib/AlgebraicTopology/SimplicialSet/Homology/HomotopyInvariance.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!