chore(LinearAlgebra/Matrix/BilinearForm): sort out namespaces

[loefflerd]

About 90% of the defs and theorems about bilinear forms are in the LinearMap.BilinForm namespace, but there are a dozen or so which are in BilinForm or BilinearForm. This PR imposes a consistent naming scheme.

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[github-actions]

PR summary 95093e961c

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

+ LinearMap.BilinForm.apply_eq_dotProduct_toMatrix_mulVec
+ LinearMap.BilinForm.dotProduct_toMatrix_mulVec
+ LinearMap.BilinForm.mul_toMatrix
+ LinearMap.BilinForm.mul_toMatrix_mul
+ LinearMap.BilinForm.toMatrix
+ LinearMap.BilinForm.toMatrixAux
+ LinearMap.BilinForm.toMatrixAux_eq
+ LinearMap.BilinForm.toMatrix_apply
+ LinearMap.BilinForm.toMatrix_basisFun
+ LinearMap.BilinForm.toMatrix_comp
+ LinearMap.BilinForm.toMatrix_compLeft
+ LinearMap.BilinForm.toMatrix_compRight
+ LinearMap.BilinForm.toMatrix_mul
+ LinearMap.BilinForm.toMatrix_mul_basis_toMatrix
+ LinearMap.BilinForm.toMatrix_symm
+ LinearMap.BilinForm.toMatrix_toBilin
+ LinearMap.toBilin'Aux_toMatrixAux

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).