Implement invulnerability/intangibility and sakurai angle (#78)

Reviewed-on: #78
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/mod.rs

@@ -161,6 +161,7 @@ pub struct EnterContext<'a> {
     pub facing_direction: &'a mut FighterFacingDirection,
     pub animation_frame: &'a mut FighterAnimationFrame,
     pub surface: &'a mut FighterSurfaceState,
+    pub vulnerability: &'a mut FighterInvulnerabilityState,
     pub fighter_attributes: &'a FighterAttributes,
     pub attack_script_assets: &'a FighterAttackScriptAssets,
     pub game_settings: &'a GameSettings,
@@ -329,6 +330,7 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
             facing_direction: &mut self.facing_direction,
             animation_frame: &mut self.animation_frame,
             surface: &mut self.surface,
+            vulnerability: &mut self.vulnerability,
             fighter_attributes: attributes,
             attack_script_assets,
             game_settings,
@@ -599,7 +601,11 @@ pub fn state_collision_interrupt_system(
 
         if pending_respawn.0 {
             **pending_respawn = false;
-            let respawn_state = FighterState::Angel(angel::AngelState::new(60 * 3));
+            let respawn_state = FighterState::Angel(angel::AngelState::new(
+                game_settings
+                    .fighter_common
+                    .angel_platform_invulnerability_duration,
+            ));
 
             // Find the angel platform position
             let respawn_point = stage_manifest