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/match_loading.rs

@@ -363,6 +363,16 @@ pub fn prepare_match(
             );
             return;
         }
+        if !baked.contains_bone(&manifest.root_motion_bone) {
+            fail_match(
+                &mut next_state,
+                &format!(
+                    "{:?} references missing root motion bone {:?}",
+                    character.fighter, manifest.root_motion_bone
+                ),
+            );
+            return;
+        }
 
         let ecb_bone_indices = baked.bone_names.iter().enumerate().filter_map(|(idx, name)| {
             if manifest.ecb_bones.contains(name) {