Chore: Apply some minor clippy fixes

* Use `.elapsed()` for duration
* Use direct iteration without calling `.iter()` and the like
* order fields in the `Text` struct creation as declared

examples/game_of_life/src/main.rs

@@ -793,7 +793,7 @@ mod grid {
                 }
             }
 
-            for (cell, amount) in adjacent_life.iter() {
+            for (cell, amount) in &adjacent_life {
                 match amount {
                     2 => {}
                     3 => {