time comparison of (a) testSchulz, (b) testOrtho, (c) testMatMul @ single vs half vs double precision

[shehan807]

see single-precision branch, starting with testSchulz with default matrix size and working up towards integrating into main program

• [x] testSchulz single prec
• [ ] testSchulz half prec
• [ ] testSchulz mixed prec

[shehan807]

preliminary speedup test from double to single shows expected ~2x improvement at larger matrix sizes for entire matrix ortho procedure