refactor(LinearAlgebra/Matrix/SesquilinearForm): Sesquilinear Maps and Scalar Matrices

[mans0954]

WIP PR to generalise from forms to maps the results not covered in #9334

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• [x] depends on: #9312
• [ ] depends on: #9334

[github-actions[bot]]

Import summary

No significant changes to the import graph

[github-actions[bot]]

PR summary 51f1624fd3

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.LinearAlgebra.Matrix.ScalarMatrix (new file)	1307

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Declarations diff

+ Nondegenerate + Nondegenerate.eq_zero_of_ortho + Nondegenerate_iff_Matrix_Nondegenerate + dotProduct + dotProduct_eq_Matrix_dotProduct + mulVec + mulVec_eq_Matrix_mulVec

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.

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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).

[leanprover-community-mathlib4-bot]

This PR/issue depends on:

• ~~leanprover-community/mathlib4#9312~~
• ~~leanprover-community/mathlib4#9334~~ By Dependent Issues (🤖). Happy coding!

[leanprover-community-bot-assistant]

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

[mans0954]

I'm not actively working on this PR as we've found other/better ways of achieving what I was trying to do so closing.