Implemented basic notification system for weapons changing.

scripts/notification_manager.gd

@@ -0,0 +1,23 @@
+class_name NotificationManager extends Node
+
+@export var notification_scene: PackedScene
+
+var _active_notification: NotificationDisplay = null
+
+func _ready() -> void:
+    EventBus.weapon_changed.connect(_on_weapon_changed)
+
+
+func _on_weapon_changed(weapon_name: String, player_node: Node2D, player_sprite_size: Vector2, origin_offset: float) -> void:
+    if notification_scene == null:
+        return
+
+    # Free any existing notification so the new one can fade in cleanly
+    if _active_notification:
+        _active_notification.queue_free()
+        _active_notification = null
+
+    var notification = notification_scene.instantiate()
+    add_child(notification)
+    _active_notification = notification
+    notification.show_notification(weapon_name, player_node, player_sprite_size, origin_offset)