feat: transfer star-related instances across equivalences

[j-loreaux]

This also adds Function.Injective.{InvolutiveStar,...} and related lemmas.

In addition we rename the existing Equiv.star to Equiv.Perm.star (without a deprecation) so that the name can be used for the declaration which transfers a Star instance across an Equiv.

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[github-actions]

PR summary 61a15581d4

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.Algebra.Star.TransferInstance (new file)	515

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Declarations diff

+ Equiv.Perm.star
+ InvolutiveStar
+ involutiveStar
+ star
++ starAddMonoid
++ starMul
++ starRing
- Equiv.star

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.

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No changes to technical debt.

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).

[themathqueen]

did you mean?

Suggested change

	protected abbrev InvolutiveStar [InvolutiveStar S] : InvolutiveStar R :=
	protected abbrev involutiveStar [InvolutiveStar S] : InvolutiveStar R :=