MatrixAlgebraKit decompositions #708

Job	Run time
Julia 1 - windows-latest -	14m 6s
Julia 1 - ubuntu-latest -	12m 45s
Julia 1 - macOS-latest -	12m 8s
Julia lts - windows-latest -	11m 39s
Julia lts - ubuntu-latest -	11m 15s
Julia lts - macOS-latest -	9m 51s
Julia nightly - ${{ matrix.os }} - ${{ matrix.arch }}	0s
	1h 11m 44s

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