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/weapons/_scripts/ranged_weapon_component.gd

@@ -3,15 +3,68 @@ extends Node2D
 class_name RangedWeaponComponent
 
 @export var stats: StatsComponent
+@export var basic_projectile: PackedScene = preload("res://assets/projectiles/basic_projectile.tscn")
 
 @onready var modifier_manager = $ModifierManager
+@onready var projectile_scene: PackedScene = basic_projectile
+
+var can_fire: bool = true
+var cooldown: Timer
+
+func _init() -> void:
+	cooldown = Timer.new()
+	add_child(cooldown)
+	cooldown.one_shot = true
 
 func _ready() -> void:
 	Log.pr("RangedWeaponComponent initialized")
 	modifier_manager.set_stats(stats)
+	modifier_manager.connect("modifier_added", _on_modifier_added)
+	modifier_manager.connect("modifier_removed", _on_modifier_removed)
+	cooldown.connect("timeout", _on_fire_timer_timeout)
 
 func add_modifier(modifier: Modifier) -> void:
 	modifier_manager.add_modifier(modifier)
 
 func remove_modifier(modifier_id: String) -> void:
-	modifier_manager.remove_modifier(modifier_id)
+	modifier_manager.remove_modifier(modifier_id)
+
+func fire(direction: Vector2, target_position: Vector2) -> void:
+	if !can_fire:
+		return
+
+	spawn_projectile(global_position, direction, target_position)
+	
+	can_fire = false
+	cooldown.start(1 / stats.get_stat("ranged.attack_rate"))
+
+func set_projectile_scene() -> void:
+	projectile_scene = basic_projectile
+	modifier_manager.check_and_call("set_projectile_scene", [self])
+
+func spawn_projectile(spawn_position: Vector2, spawn_direction: Vector2, target_position: Vector2) -> void:
+	Log.pr("Spawning projectile")
+	modifier_manager.check_and_call("spawn_projectile", [self])
+
+	## TODO: Handle multiple shots per fire 
+
+	var projectile = projectile_scene.instantiate()
+	projectile.global_position = spawn_position
+	projectile.target_position = target_position
+	projectile.speed = 200 # stats.get_stat("projectile_speed")
+	projectile.damage = 10 # stats.get_stat("damage")
+	projectile.lifetime = 2 # stats.get_stat("projectile_lifetime")
+	projectile.source_weapon = self
+	var size = stats.get_stat("ranged.projectile_size")
+	projectile.set_projectile_scale(Vector2(size, size))
+	if get_tree() and get_tree().get_root():
+		get_tree().get_root().add_child(projectile)
+
+func _on_modifier_added(_modifier: Modifier) -> void:
+	set_projectile_scene()
+
+func _on_modifier_removed(_modifier: Modifier) -> void:
+	set_projectile_scene()
+
+func _on_fire_timer_timeout() -> void:
+	can_fire = true