Setup rustfmt for everything and address cargo clippy.

rtiow/renderer/src/noise/perlin.rs

@@ -35,7 +35,7 @@ fn perlin_generate_perm<R>(rng: &mut R) -> Vec<usize>
 where
     R: Rng,
 {
-    let mut p: Vec<usize> = (0..256).map(|i| i).collect();
+    let mut p: Vec<usize> = (0..256).collect();
     p.shuffle(rng);
     p
 }