Implement directional influence (#43)

Reviewed-on: #43
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/game_settings.rs

@@ -36,6 +36,9 @@ pub struct FighterSettingsCommon {
     pub visual_shake_table: Vec<f32>,
     /// The attacker will always get less hitstop
     pub attacker_visual_shake_multiplier: f32,
+    
+    /// Maximum angle changed caused by directional influence
+    pub di_max_angle: FGi32,
 }
 #[derive(Reflect, Serialize, Deserialize, Clone)]
 #[reflect(opaque)]