[Merged by Bors] - feat(LinearAlgebra/Projectivization/Action): add instance of SL(n, F) acting on PF^n

[Whysoserioushah]

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• depends on: [Merged by Bors] - feat(LinearAlgebra/Matrix/SpecialLinearGroup): Add action on R^n #39581

[github-actions]

PR summary ff507ef05a

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ instance : IsMultiplyPretransitive (Matrix.SpecialLinearGroup ι K) (ℙ K (ι → K)) 2
+ matrixSpecialLinearGroup_smul_def
+ prePrimitive_SL

You can run this locally as follows

## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

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

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

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.

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No changes to strong technical debt.

No changes to weak technical debt.

[mathlib-dependent-issues]

This PR/issue depends on:

• [Merged by Bors] - feat(LinearAlgebra/Matrix/SpecialLinearGroup): Add action on R^n #39581
  By Dependent Issues (🤖). Happy coding!

[mathlib-merge-conflicts]

This pull request has conflicts, please merge master and resolve them.

[riccardobrasca]

Thanks!

bors merge

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

• ci (staging) / Post-Build Step
• ci (staging) / Post-CI job
• ci (staging) / Lint style
• ci (staging) / Build