feat: add C ndarray interface and refactor implementation for `stats/base/sstdevpn`#5355

kgryte merged 8 commits intostdlib-js:developstdlib-js/stdlib:developfrom

0PrashantYadav0:ndarray-sstdevpn0PrashantYadav0/stdlib:ndarray-sstdevpnCopy head branch name to clipboard