[Merged by Bors] - feat(CategoryTheory): commutative group objects in the category of types

[TwoFX]

---

• depends on: [Merged by Bors] - feat(CategoryTheory): group objects #21347
• depends on: [Merged by Bors] - feat(CategoryTheory): commutative group objects #21508
• depends on: [Merged by Bors] - feat(CategoryTheory): group objects in the category of types #21576

[github-actions]

PR summary 646497e5d2

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.CategoryTheory.Monoidal.Internal.Types.CommGrp_ (new file)	684

---

Declarations diff

+ commGrpCommGroup
+ commGrpTypeEquivalenceCommGrp
+ commGrpTypeEquivalenceCommGrpForgetCommMon
+ commGrpTypeEquivalenceCommGrpForgetGrp
+ functor
+ inverse

You can run this locally as follows

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

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

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

---

No changes to technical debt.

You can run this locally as

./scripts/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).

[mathlib4-dependent-issues-bot]

This PR/issue depends on:

• [Merged by Bors] - feat(CategoryTheory): group objects #21347
• [Merged by Bors] - feat(CategoryTheory): commutative group objects #21508
• [Merged by Bors] - feat(CategoryTheory): group objects in the category of types #21576
  By Dependent Issues (🤖). Happy coding!

[joelriou]

Thanks!

bors merge

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

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