Implement animation root motion deltas (#84)

Implements root motion and adds a dash attack.

Reviewed-on: #84
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/dash.rs

@@ -4,7 +4,7 @@ use super::{
 };
 use crate::fighter::FighterFacingDirection;
 use crate::fighter::animation::AnimKind;
-use crate::fighter::state::FighterState;
+use crate::fighter::state::{FighterState, ground_attack};
 use crate::input::FighterCommands::{SmashMoveLeft, SmashMoveRight};
 
 #[derive(Debug, Clone, Hash)]
@@ -23,6 +23,16 @@ impl FighterStateImpl for DashState {
     fn check_interrupt(&self, ctx: &mut InterruptContext) -> Option<FighterState> {
         let attributes = ctx.fighter_attributes;
 
+        if ctx.get_current_animation_frame() <= 2 {
+            if let Some(state) = ground_attack::check_interrupt(ctx) {
+                return Some(state);
+            }
+        } else {
+            if let Some(state) = ground_attack::check_interrupt_dash_attack(ctx) {
+                return Some(state);
+            }
+        }
+
         // A reverse dash can interrupt before IASA
         if let Some(direction) =
             check_smash_input_with_dir(ctx).filter(|direction| *direction != self.direction)