add information about experiment to `inbreeding load`

this can be used by plot without passing extra arguments, i.e. the pipeline becomes

use bins/inbreeding

let experiment = "..."

inbreeding load $experiment | inbreeding plot

instead of having to know the value of k and do

inbreeding load $experiment | inbreeding plot --options { k: $k }

bins/inbreeding/README.md

@@ -37,5 +37,5 @@ inbreeding run --options $OPTS --prng-seed $PRNG_SEED
 ```
 ```bash
 let experiment = $"($PRNG_SEED)-($OPTS.environment)-($OPTS.k)-($OPTS.n)-($OPTS.nb_bytes)"
-inbreeding load $experiment | inbreeding plot --options { k: $OPTS.k }
+inbreeding load $experiment | inbreeding plot
 ```