Add Godot project shell

godot/scenes/bootstrap/GameRoot.tscn

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+[gd_scene load_steps=5 format=3 uid="uid://b1fxc23gkbqre"]
+
+[ext_resource type="Script" path="res://scripts/bootstrap/GameRoot.cs" id="1_game_root"]
+[ext_resource type="Script" path="res://scripts/debug/DebugOverlay.cs" id="2_debug_overlay"]
+[ext_resource type="PackedScene" path="res://scenes/menu/MenuPlaceholder.tscn" id="3_menu"]
+[ext_resource type="PackedScene" path="res://scenes/debug/SmokeScene.tscn" id="4_smoke"]
+
+[node name="GameRoot" type="Node"]
+script = ExtResource("1_game_root")
+MenuScene = ExtResource("3_menu")
+SmokeScene = ExtResource("4_smoke")
+
+[node name="DebugOverlay" type="CanvasLayer" parent="."]
+script = ExtResource("2_debug_overlay")

godot/scenes/debug/SmokeScene.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://dpsx0hxc4vd5s"]
+
+[ext_resource type="Script" path="res://scripts/debug/SmokeSceneController.cs" id="1_smoke_scene_controller"]
+
+[node name="SmokeScene" type="Node2D"]
+script = ExtResource("1_smoke_scene_controller")
+
+[node name="HeroPlaceholder" type="Polygon2D" parent="."]
+position = Vector2(160, 180)
+color = Color(0.25, 0.85, 1, 1)
+polygon = PackedVector2Array(48, 0, -32, -24, -12, 0, -32, 24)
+
+[node name="SmokeLabel" type="Label" parent="."]
+offset_left = 96.0
+offset_top = 224.0
+offset_right = 384.0
+offset_bottom = 256.0
+text = "Smoke Scene"

godot/scenes/menu/MenuPlaceholder.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://cg86dxl2ys1vh"]
+
+[ext_resource type="Script" path="res://scripts/menu/MenuPlaceholder.cs" id="1_menu_placeholder"]
+
+[node name="MenuPlaceholder" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_menu_placeholder")
+
+[node name="Title" type="Label" parent="."]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -210.0
+offset_top = -32.0
+offset_right = 210.0
+offset_bottom = 0.0
+grow_horizontal = 2
+grow_vertical = 2
+horizontal_alignment = 1
+vertical_alignment = 1
+text = "SideScrollerGame - Menu Placeholder"
+
+[node name="Hint" type="Label" parent="."]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -240.0
+offset_top = 8.0
+offset_right = 240.0
+offset_bottom = 40.0
+grow_horizontal = 2
+grow_vertical = 2
+horizontal_alignment = 1
+vertical_alignment = 1
+text = "Run with -- --debug-boot=smoke for smoke scene"