MatrixAlgebraKit decompositions #768

Job	Run time
Julia 1 - macOS-latest -	6h 0m 43s
Julia 1 - windows-latest -	2h 20m 48s
Julia lts - windows-latest -	2h 2m 27s
Julia lts - macOS-latest -	6h 0m 50s
Julia 1 - ubuntu-latest -	2h 39m 4s
Julia lts - ubuntu-latest -	1h 50m 36s
Julia nightly - ${{ matrix.os }} - ${{ matrix.arch }}	0s
	20h 54m 28s

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