Implements modifier system for weapons

Adds a modifier system allowing dynamic modification of weapon
stats and behavior. This includes:

- Creating ModifierLibrary to manage available modifiers.
- Adds ModifierManager to handle equipping and unequipping modifiers
- Adds a new RangedWeaponComponent to handle firing projectiles and
  managing modifiers.
- Introduces a DebugUI for in-game modifier management.
- Introduces an "Unlimited Power" modifier that changes the projectile scene.
- Modifies stats components to work with the new modifier system.

This system allows for more flexible and customizable weapon
functionality.

combat/modifiers/_scripts/modifier_manager.gd

@@ -18,6 +18,12 @@ func _ready() -> void:
 func set_stats(stats: StatsComponent) -> void:
 	self.stats_component = stats
 
+func has_modifier(modifier_id: String) -> bool:
+	for modifier in modifiers:
+		if modifier.id == modifier_id:
+			return true
+	return false
+
 func add_modifier(modifier: Modifier) -> void:
 	modifiers.append(modifier)
 	modifier.on_equip(get_parent())
@@ -63,6 +69,29 @@ func recalculate_stats() -> void:
 	
 	emit_signal("stats_updated")
 
+func check_callable(func_name: String) -> Callable:
+	# Create a default callable that does nothing and returns null
+	var default_callable = func(): return null
+
+	# Check each modifier in priority order
+	for modifier in modifiers:
+			if modifier.has_method(func_name):
+					# Return the callable from this modifier
+					return Callable(modifier, func_name)
+
+	# Return the default callable if no modifier has the function
+	return default_callable
+
+# Convenience method to check and call in one step
+func check_and_call(func_name: String, args := []):
+	var callable = check_callable(func_name)
+	if callable.is_valid():
+			if args.size() > 0:
+					return callable.callv(args)
+			else:
+					return callable.call()
+	return null
+
 func _apply_modifier_stats(modifier: Modifier) -> void:
 	if modifier.has_method("apply_stats_modification"):
 		modifier.apply_stats_modification(stats_component)