takes a line for a SNP file and splits into parts.
Examples
split_line("1_14.570829090394763 1 0.000000 14 A X")
#> # A tibble: 1 × 6
#> snp chr pos site anc der
#> <chr> <dbl> <dbl> <dbl> <chr> <chr>
#> 1 1_14.570829090394763 1 0 14 A X
split_line("rs3094315 1 0.0 752566 G A")
#> # A tibble: 1 × 6
#> snp chr pos site anc der
#> <chr> <dbl> <dbl> <dbl> <chr> <chr>
#> 1 rs3094315 1 0 752566 G A