Configure project settings and import assets

This commit sets up the initial project configuration including: -
Window size and scaling settings - Input mappings for player controls -
Default texture filtering settings - Import of game asset pack with
sprites and UI elements - Set of signals for tracking player bullets

scenes/bullet.gd

@@ -0,0 +1,18 @@
+extends Area2D
+@export var speed = -250
+
+
+func _on_visible_on_screen_notifier_2d_screen_exited() -> void:
+  queue_free()
+
+
+func _on_area_entered(area: Area2D) -> void:
+  if area.is_in_group("enemies"):
+         area.explode()
+         queue_free()
+
+func start(pos):
+    position = pos
+
+func _process(delta):
+    position.y += speed * delta