Implement up smash, dacus and further improve input system. (#88)

Reviewed-on: #88
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/ground_attack.rs

@@ -21,6 +21,19 @@ impl FighterStateImpl for GroundAttackState {
     const NAME: &'static str = "GroundAttack";
 
     fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
+        // Allow interrupting dash attack only into an up/down smash
+        if let AttackKind::DashAttack = self.attack_kind {
+            if state_context.get_current_animation_frame() < state_context.fighter_attributes.dash_attack_cancel_window {
+                if let Some(state) = check_interrupt(state_context) {
+                    if let FighterState::GroundAttack(state) = state {
+                        if matches!(state.attack_kind, AttackKind::UpSmash) || matches!(state.attack_kind, AttackKind::DownSmash) {
+                            return Some(FighterState::GroundAttack(state));
+                        }
+                    }
+                }
+            }
+        }
+
         if state_context.is_current_animation_finished() {
             Some(FighterState::Wait(WaitState))
         } else {