initial implementation of sword attack

Player/Sword.tscn

@@ -0,0 +1,76 @@
+[gd_scene load_steps=5 format=2]
+
+[ext_resource path="res://Sprites/Items/Sword.png" type="Texture" id=1]
+[ext_resource path="res://Player/Sword.gd" type="Script" id=2]
+
+[sub_resource type="Animation" id=4]
+length = 0.001
+tracks/0/type = "value"
+tracks/0/path = NodePath("Sword:rotation_degrees")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0 ),
+"transitions": PoolRealArray( 1 ),
+"update": 0,
+"values": [ 45.0 ]
+}
+tracks/1/type = "value"
+tracks/1/path = NodePath("Sword:position")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/keys = {
+"times": PoolRealArray( 0 ),
+"transitions": PoolRealArray( 1 ),
+"update": 0,
+"values": [ Vector2( 8, -7 ) ]
+}
+
+[sub_resource type="Animation" id=5]
+resource_name = "swing"
+length = 0.3
+tracks/0/type = "value"
+tracks/0/path = NodePath("Sword:position")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0, 0.1, 0.3 ),
+"transitions": PoolRealArray( 1, 1, 1 ),
+"update": 0,
+"values": [ Vector2( 0, 0 ), Vector2( 2, 7 ), Vector2( 2, 7 ) ]
+}
+tracks/1/type = "value"
+tracks/1/path = NodePath("Sword:rotation_degrees")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/keys = {
+"times": PoolRealArray( 0, 0.1, 0.3 ),
+"transitions": PoolRealArray( 1, 1, 1 ),
+"update": 0,
+"values": [ 45.0, 180.0, 180.0 ]
+}
+
+[node name="SwordAnimation" type="Node2D"]
+script = ExtResource( 2 )
+
+[node name="Sword" type="Sprite" parent="."]
+visible = false
+position = Vector2( 8, -7 )
+rotation = 0.785398
+scale = Vector2( 0.5, 0.5 )
+texture = ExtResource( 1 )
+
+[node name="SwordAttack" type="AnimationPlayer" parent="."]
+anims/RESET = SubResource( 4 )
+anims/swing = SubResource( 5 )
+
+[connection signal="animation_finished" from="SwordAttack" to="." method="_on_SwordAttack_animation_finished"]
+[connection signal="animation_started" from="SwordAttack" to="." method="_on_SwordAttack_animation_started"]