Added configurable weapons.

AlientAttack.MonoGame/Things/Weapons/ConfigurableWeapon.cs

@@ -0,0 +1,36 @@
+using AlienAttack.MonoGame.Things.Muzzles;
+
+namespace AlienAttack.MonoGame.Things.Weapons;
+
+public class ConfigurableWeapon(WeaponDef def, WeaponState state) : Weapon
+{
+    public override int FireThreshold => state.FireThreshold;
+
+    public override void Fire(Sprite owner, SpriteUpdateContext context)
+    {
+        if (owner is not Player player) return;
+
+        foreach (var shot in def.Pattern.Shots)
+        {
+            // muzzle local -> world
+            var muzzleLocal = player.GetMuzzleLocal(shot.Muzzle); // make a fast lookup
+            var muzzleWorld = MuzzleMath.GetMuzzleWorld(player, muzzleLocal);
+
+            // speed upgrade
+            float vx = shot.Velocity.X * state.SpeedMultiplier;
+            float vy = shot.Velocity.Y * state.SpeedMultiplier;
+
+            // center bullet on muzzle + pattern offset
+            var pos = MuzzleMath.CenterBulletOn(muzzleWorld, def.Bullet.Width, def.Bullet.Height) + shot.Offset;
+
+            var bullet = def.Bullet.Create(pos.X, pos.Y, vx, vy, owner);
+
+            // optional: apply damage bonus generically
+            //bullet.Damage += state.DamageBonus;
+
+            context.SpawnSprite(bullet);
+        }
+
+        context.AudioManager.PlayPlayerFire(); // or use _def.FireSfxKey -> audio routing
+    }
+}