Adds lightning projectile

Implements a lightning projectile with visual effects.
The lightning is created using a series of bolt components that dynamically adjust their shape.
Also refactors the projectile system to use a base class.

Removes unused modifiers from player script.

player/weapons/projectile_lightning.gd

@@ -0,0 +1,30 @@
+class_name ProjectileLightning
+extends ProjectileBase
+
+@export var line_width: float = 1
+@onready var lightning: Array = get_children()
+
+func _init() -> void:
+	#super._init()
+	Log.pr("ProjectileLightning _init")
+
+func _ready():
+	lifetime_timer = Timer.new()
+	add_child(lifetime_timer)
+	lifetime_timer.one_shot = true
+	lifetime_timer.wait_time = lifetime
+	lifetime_timer.connect("timeout", _on_lifetime_timeout)
+	lifetime_timer.start()
+
+	emit_signal("on_spawned", self)
+	connect("body_entered", _on_body_entered)
+
+func _process(_delta):
+	for child in lightning:
+		child.goal_point = target_position
+
+func _physics_process(delta):
+	position += direction * speed * delta
+
+func _on_lifetime_timeout():
+	super._on_lifetime_timeout()