Add ledge getup, ledge intangibility limit & fix walk-off velocity (#93)

Reviewed-on: #93
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/air.rs

@@ -1,6 +1,6 @@
 use crate::fighter::state::jump::{self};
 use crate::fighter::state::land::{LandingState, LandingType};
-use crate::fighter::state::ledge_wait::LedgeWaitState;
+use crate::fighter::state::ledge_grab::LedgeGrabState;
 use crate::fighter::state::{
     CollisionContext, FighterState, InterruptContext, air_attack, air_dodge,
 };
@@ -129,10 +129,7 @@ pub fn collision_interrupt(
 ) -> Option<FighterState> {
     if ctx.velocity.y <= FGi32::ZERO {
         if let Some(ledge_result) = ctx.air_collide_with_ledges() {
-            return Some(FighterState::LedgeWait(LedgeWaitState {
-                airborne_state_common: AirborneStateCommon::default(),
-                ledge_id: ledge_result.ledge,
-            }));
+            return Some(FighterState::LedgeGrab(LedgeGrabState::new(ledge_result.ledge)));
         }
     }
 
@@ -144,7 +141,7 @@ pub fn collision_interrupt(
     ctx.ecb.right -= diff;
     ctx.translation.0 = res.hit_position;
     ctx.presentation_snap.0 = true;
-    ctx.surface.land(res.line_id);
+    ctx.surface.land(res.line_id, ctx.ledge_info);
     Some(FighterState::Land(LandingState::create(landing_type)))
 }