support proper 32-byte RNG seeds

• add optional $.help to argument err of error throw
• parse prng_seed: [u8; 32] in rng and inbreeding
• compute the "local" seed by hashing the "global" seed, the strategy and the iteration index
• pass --prng-seed: string, a 64-char long seed to inbreeding run

bins/inbreeding/Cargo.toml

@@ -11,3 +11,4 @@ clap = { version = "4.5.4", features = ["derive"] }
 rand = "0.8.5"
 indicatif = "0.17.8"
 ark-ff = "0.4.2"
+hex = "0.4.3"