feat: add `slice` method to `array/fixed-endian-factory`#3188

DhruvArvindSingh wants to merge 6 commits intostdlib-js:developstdlib-js/stdlib:developfrom

DhruvArvindSingh:#3154_add_slice_method_to_array/fixed-endian-factoryDhruvArvindSingh/stdlib:#3154_add_slice_method_to_array/fixed-endian-factoryCopy head branch name to clipboard