Fix various minor issues

src/input/frame.rs

@@ -4,7 +4,7 @@ use crate::math::vec::FGVec2;
 
 /// One frame of a player's raw input. This is the type GGRS serializes and
 /// sends over the wire, so keep it small and keep it `PartialEq`.
-#[derive(Copy, Clone, Debug, PartialEq, Default, Serialize, Deserialize)]
+#[derive(Copy, Clone, Debug, PartialEq, Default, Serialize, Deserialize, Hash)]
 pub struct FighterInputFrame {
     pub movement: FGVec2,
     pub directional_attack: FGVec2,