Add function documentation

src/game/seed.rs

@@ -2,10 +2,12 @@ use std::hash::{DefaultHasher, Hash, Hasher};
 
 use bevy::prelude::*;
 
+/// Value with which to initialize the PRNG
 #[derive(Clone, Resource)]
 pub struct Seed(u64);
 
 impl From<String> for Seed {
+    /// Attempt to parse as an integer, fall back to hashing string
     fn from(value: String) -> Self {
         Self(value.parse::<u64>().unwrap_or_else(|_| {
             let mut state = DefaultHasher::new();
@@ -16,6 +18,7 @@ impl From<String> for Seed {
 }
 
 impl From<Seed> for [u8; 8] {
+    /// Convert to a u8 array for ingestion by random number generator
     fn from(value: Seed) -> Self {
         value.0.to_le_bytes()
     }