implement sSQRTXX, sInvSQRTXX, sSQRTYY, sInvSQRTYY (#368) #2017

Job	Run time
Documentation	6m 41s
Julia 1 - t=1 - ubuntu-latest - x64 - push	26m 34s
Julia 1 - t=5 - ubuntu-latest - x64 - push	31m 57s
Julia 1.9 - t=1 - ubuntu-latest - x64 - push	24m 1s
Julia 1.9 - t=5 - ubuntu-latest - x64 - push	31m 11s
Julia 1 - t=1 - macos-latest - aarch64 - push	22m 0s
Julia 1 - t=1 - macos-latest - x64 - push	39m 11s
Julia 1 - t=1 - windows-latest - x64 - push	32m 11s
	3h 33m 46s

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