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/attack/mod.rs

@@ -221,6 +221,7 @@ pub enum AttackKind {
     UpSmash,
     DownSmash,
     ForwardSmash,
+    DashAttack,
 }
 
 impl AttackKind {
@@ -238,6 +239,7 @@ impl AttackKind {
             AttackKind::UpSmash => AnimKind::AttackUpTilt,
             AttackKind::DownSmash => AnimKind::AttackUpTilt,
             AttackKind::ForwardSmash => AnimKind::AttackUpTilt,
+            AttackKind::DashAttack => AnimKind::AttackDash,
         }
     }
 }