game: add weapon base and sword

scenes/weapons/weapon_sword_projectile.tscn

@@ -0,0 +1,24 @@
+[gd_scene load_steps=4 format=3 uid="uid://bv5f47x3ishmf"]
+
+[ext_resource type="Script" uid="uid://c40iaqdubwl0p" path="res://scenes/weapons/weapon_sword_projectile.gd" id="1_asuu4"]
+[ext_resource type="Texture2D" uid="uid://dycw7c3484dir" path="res://assets/sprites/sword.png" id="2_pxap4"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_ygc1t"]
+size = Vector2(16, 46)
+
+[node name="WeaponSwordProjectile" type="Node2D"]
+script = ExtResource("1_asuu4")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+texture = ExtResource("2_pxap4")
+
+[node name="Area2D" type="Area2D" parent="."]
+collision_layer = 0
+collision_mask = 2
+monitorable = false
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Area2D"]
+position = Vector2(0, -5)
+shape = SubResource("RectangleShape2D_ygc1t")
+
+[connection signal="body_entered" from="Area2D" to="." method="_on_area_2d_body_entered"]