Add player health, lives, death, and cutscene system

Added player damage, invulnerability frames, knockback, and death handling. Enemies stop attacking after player death and player controls are disabled. Added a persistent three-life system with ambulance cutscenes after the first two deaths and a final Game Over cutscene after the third death.

Scenes/Characters/Player.tscn

@@ -716,7 +716,7 @@ z_index = 10
 texture_filter = 1
 position = Vector2(0, -6)
 sprite_frames = SubResource("SpriteFrames_nn08x")
-animation = &"idle"
+animation = &"death"
 autoplay = "idle"
 
 [node name="ChildGraphic" type="AnimatedSprite2D" parent="."]

Scenes/ambulance_cutscene.tscn

@@ -0,0 +1,25 @@
+[gd_scene load_steps=3 format=3 uid="uid://ci5nqe61278ke"]
+
+[ext_resource type="VideoStream" uid="uid://l34f82rsegd6" path="res://Assets/Cut Scenes/Weewoo.ogv" id="1_3dlu2"]
+[ext_resource type="Script" uid="uid://basrxhaxblk5q" path="res://Scripts/ambulance_cutscene.gd" id="1_yn2le"]
+
+[node name="AmbulanceCutscene" type="Control"]
+layout_mode = 3
+anchors_preset = 0
+offset_right = 960.0
+offset_bottom = 540.0
+script = ExtResource("1_yn2le")
+
+[node name="VideoStreamPlayer" type="VideoStreamPlayer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+scale = Vector2(0.34, 0.34)
+stream = ExtResource("1_3dlu2")
+autoplay = true
+expand = true
+
+[connection signal="finished" from="VideoStreamPlayer" to="." method="_on_video_stream_player_finished"]

Scenes/final_death_cutscene.tscn

@@ -0,0 +1,21 @@
+[gd_scene load_steps=2 format=3 uid="uid://dofx2pgo5xgla"]
+
+[ext_resource type="VideoStream" uid="uid://b41725daretoj" path="res://Assets/Cut Scenes/Game over video.ogv" id="1_h6d1g"]
+
+[node name="FinalDeathCutscene" type="Control"]
+layout_mode = 3
+anchors_preset = 0
+offset_right = 960.0
+offset_bottom = 540.0
+
+[node name="VideoStreamPlayer" type="VideoStreamPlayer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+scale = Vector2(0.34, 0.34)
+stream = ExtResource("1_h6d1g")
+autoplay = true
+expand = true