Implement invulnerability/intangibility and sakurai angle

src/fighter/state/air_dodge.rs

@@ -33,14 +33,9 @@ impl FighterStateImpl for AirDodgeState {
     }
 
     fn update(&mut self, state_context: &mut UpdateContext) {
-        let airdodge_intangible_end = state_context.fighter_attributes.air_dodge_intangible_start
-            + state_context
-                .fighter_attributes
-                .air_dodge_intangible_duration;
-        if state_context.animation_frame
-            == state_context.fighter_attributes.air_dodge_intangible_start
-        {
-            *state_context.vulnerability = FighterInvulnerabilityState::Intangible;
+        let airdodge_intangible_end = state_context.fighter_attributes.air_dodge_intangible_start + state_context.fighter_attributes.air_dodge_intangible_duration;
+        if state_context.animation_frame == state_context.fighter_attributes.air_dodge_intangible_start {
+            *state_context.vulnerability = FighterInvulnerabilityState::Intangible { frames_remaining: Some(state_context.fighter_attributes.air_dodge_intangible_duration) };
         } else if state_context.animation_frame >= airdodge_intangible_end {
             *state_context.vulnerability = FighterInvulnerabilityState::Vulnerable;
         }