PoC,WIP: Proof of concept for extending buffer protocol string #1

Job	Run time
ATLAS	0s
BLIS	0s
FlexiBLAS (LP64, ILP64 on Fedora)	0s
MKL (LP64, ILP64, SDL)	0s
Debian libblas/liblapack	0s
OpenSUSE Netlib BLAS/LAPACK	0s
OpenBLAS with CMake	0s
OpenBLAS (Fedora, no pkg-config, LP64/ILP64)	0s
Test Linux (${{ ((matrix.USE_NIGHTLY_OPENBLAS && 'nightly') \|\| 'stable') }} OpenBLAS)	0s
	0s

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